Update mantra 3.0.4

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>

1 files changed, 4474 insertions, 0 deletions

diff --git a/themes/mantra/resources/js/PIE/PIE_uncompressed.js b/themes/mantra/resources/js/PIE/PIE_uncompressed.js
new file mode 100644
index 00000000..85f6785e
--- /dev/null
+++ b/themes/mantra/resources/js/PIE/PIE_uncompressed.js
@@ -0,0 +1,4474 @@
+/*
+PIE: CSS3 rendering for IE
+Version 1.0.0
+http://css3pie.com
+Dual-licensed for use under the Apache License Version 2.0 or the General Public License (GPL) Version 2.
+*/
+(function(){
+var doc = document;var PIE = window['PIE'];
+
+if( !PIE ) {
+    PIE = window['PIE'] = {
+        CSS_PREFIX: '-pie-',
+        STYLE_PREFIX: 'Pie',
+        CLASS_PREFIX: 'pie_',
+        tableCellTags: {
+            'TD': 1,
+            'TH': 1
+        },
+
+        /**
+         * Lookup table of elements which cannot take custom children.
+         */
+        childlessElements: {
+            'TABLE':1,
+            'THEAD':1,
+            'TBODY':1,
+            'TFOOT':1,
+            'TR':1,
+            'INPUT':1,
+            'TEXTAREA':1,
+            'SELECT':1,
+            'OPTION':1,
+            'IMG':1,
+            'HR':1
+        },
+
+        /**
+         * Elements that can receive user focus
+         */
+        focusableElements: {
+            'A':1,
+            'INPUT':1,
+            'TEXTAREA':1,
+            'SELECT':1,
+            'BUTTON':1
+        },
+
+        /**
+         * Values of the type attribute for input elements displayed as buttons
+         */
+        inputButtonTypes: {
+            'submit':1,
+            'button':1,
+            'reset':1
+        },
+
+        emptyFn: function() {}
+    };
+
+    // Force the background cache to be used. No reason it shouldn't be.
+    try {
+        doc.execCommand( 'BackgroundImageCache', false, true );
+    } catch(e) {}
+
+    (function() {
+        /*
+         * IE version detection approach by James Padolsey, with modifications -- from
+         * http://james.padolsey.com/javascript/detect-ie-in-js-using-conditional-comments/
+         */
+        var ieVersion = 4,
+            div = doc.createElement('div'),
+            all = div.getElementsByTagName('i'),
+            shape;
+        while (
+            div.innerHTML = '<!--[if gt IE ' + (++ieVersion) + ']><i></i><![endif]-->',
+            all[0]
+        ) {}
+        PIE.ieVersion = ieVersion;
+
+        // Detect IE6
+        if( ieVersion === 6 ) {
+            // IE6 can't access properties with leading dash, but can without it.
+            PIE.CSS_PREFIX = PIE.CSS_PREFIX.replace( /^-/, '' );
+        }
+
+        PIE.ieDocMode = doc.documentMode || PIE.ieVersion;
+
+        // Detect VML support (a small number of IE installs don't have a working VML engine)
+        div.innerHTML = '<v:shape adj="1"/>';
+        shape = div.firstChild;
+        shape.style['behavior'] = 'url(#default#VML)';
+        PIE.supportsVML = (typeof shape['adj'] === "object");
+    }());
+/**
+ * Utility functions
+ */
+(function() {
+    var vmlCreatorDoc,
+        idNum = 0,
+        imageSizes = {};
+
+
+    PIE.Util = {
+
+        /**
+         * To create a VML element, it must be created by a Document which has the VML
+         * namespace set. Unfortunately, if you try to add the namespace programatically
+         * into the main document, you will get an "Unspecified error" when trying to
+         * access document.namespaces before the document is finished loading. To get
+         * around this, we create a DocumentFragment, which in IE land is apparently a
+         * full-fledged Document. It allows adding namespaces immediately, so we add the
+         * namespace there and then have it create the VML element.
+         * @param {string} tag The tag name for the VML element
+         * @return {Element} The new VML element
+         */
+        createVmlElement: function( tag ) {
+            var vmlPrefix = 'css3vml';
+            if( !vmlCreatorDoc ) {
+                vmlCreatorDoc = doc.createDocumentFragment();
+                vmlCreatorDoc.namespaces.add( vmlPrefix, 'urn:schemas-microsoft-com:vml' );
+            }
+            return vmlCreatorDoc.createElement( vmlPrefix + ':' + tag );
+        },
+
+
+        /**
+         * Generate and return a unique ID for a given object. The generated ID is stored
+         * as a property of the object for future reuse.
+         * @param {Object} obj
+         */
+        getUID: function( obj ) {
+            return obj && obj[ '_pieId' ] || ( obj[ '_pieId' ] = '_' + ++idNum );
+        },
+
+
+        /**
+         * Simple utility for merging objects
+         * @param {Object} obj1 The main object into which all others will be merged
+         * @param {...Object} var_args Other objects which will be merged into the first, in order
+         */
+        merge: function( obj1 ) {
+            var i, len, p, objN, args = arguments;
+            for( i = 1, len = args.length; i < len; i++ ) {
+                objN = args[i];
+                for( p in objN ) {
+                    if( objN.hasOwnProperty( p ) ) {
+                        obj1[ p ] = objN[ p ];
+                    }
+                }
+            }
+            return obj1;
+        },
+
+
+        /**
+         * Execute a callback function, passing it the dimensions of a given image once
+         * they are known.
+         * @param {string} src The source URL of the image
+         * @param {function({w:number, h:number})} func The callback function to be called once the image dimensions are known
+         * @param {Object} ctx A context object which will be used as the 'this' value within the executed callback function
+         */
+        withImageSize: function( src, func, ctx ) {
+            var size = imageSizes[ src ], img, queue;
+            if( size ) {
+                // If we have a queue, add to it
+                if( Object.prototype.toString.call( size ) === '[object Array]' ) {
+                    size.push( [ func, ctx ] );
+                }
+                // Already have the size cached, call func right away
+                else {
+                    func.call( ctx, size );
+                }
+            } else {
+                queue = imageSizes[ src ] = [ [ func, ctx ] ]; //create queue
+                img = new Image();
+                img.onload = function() {
+                    size = imageSizes[ src ] = { w: img.width, h: img.height };
+                    for( var i = 0, len = queue.length; i < len; i++ ) {
+                        queue[ i ][ 0 ].call( queue[ i ][ 1 ], size );
+                    }
+                    img.onload = null;
+                };
+                img.src = src;
+            }
+        }
+    };
+})();/**
+ * Utility functions for handling gradients
+ */
+PIE.GradientUtil = {
+
+    getGradientMetrics: function( el, width, height, gradientInfo ) {
+        var angle = gradientInfo.angle,
+            startPos = gradientInfo.gradientStart,
+            startX, startY,
+            endX, endY,
+            startCornerX, startCornerY,
+            endCornerX, endCornerY,
+            deltaX, deltaY,
+            p, UNDEF;
+
+        // Find the "start" and "end" corners; these are the corners furthest along the gradient line.
+        // This is used below to find the start/end positions of the CSS3 gradient-line, and also in finding
+        // the total length of the VML rendered gradient-line corner to corner.
+        function findCorners() {
+            startCornerX = ( angle >= 90 && angle < 270 ) ? width : 0;
+            startCornerY = angle < 180 ? height : 0;
+            endCornerX = width - startCornerX;
+            endCornerY = height - startCornerY;
+        }
+
+        // Normalize the angle to a value between [0, 360)
+        function normalizeAngle() {
+            while( angle < 0 ) {
+                angle += 360;
+            }
+            angle = angle % 360;
+        }
+
+        // Find the start and end points of the gradient
+        if( startPos ) {
+            startPos = startPos.coords( el, width, height );
+            startX = startPos.x;
+            startY = startPos.y;
+        }
+        if( angle ) {
+            angle = angle.degrees();
+
+            normalizeAngle();
+            findCorners();
+
+            // If no start position was specified, then choose a corner as the starting point.
+            if( !startPos ) {
+                startX = startCornerX;
+                startY = startCornerY;
+            }
+
+            // Find the end position by extending a perpendicular line from the gradient-line which
+            // intersects the corner opposite from the starting corner.
+            p = PIE.GradientUtil.perpendicularIntersect( startX, startY, angle, endCornerX, endCornerY );
+            endX = p[0];
+            endY = p[1];
+        }
+        else if( startPos ) {
+            // Start position but no angle specified: find the end point by rotating 180deg around the center
+            endX = width - startX;
+            endY = height - startY;
+        }
+        else {
+            // Neither position nor angle specified; create vertical gradient from top to bottom
+            startX = startY = endX = 0;
+            endY = height;
+        }
+        deltaX = endX - startX;
+        deltaY = endY - startY;
+
+        if( angle === UNDEF ) {
+            // Get the angle based on the change in x/y from start to end point. Checks first for horizontal
+            // or vertical angles so they get exact whole numbers rather than what atan2 gives.
+            angle = ( !deltaX ? ( deltaY < 0 ? 90 : 270 ) :
+                        ( !deltaY ? ( deltaX < 0 ? 180 : 0 ) :
+                            -Math.atan2( deltaY, deltaX ) / Math.PI * 180
+                        )
+                    );
+            normalizeAngle();
+            findCorners();
+        }
+
+        return {
+            angle: angle,
+            startX: startX,
+            startY: startY,
+            endX: endX,
+            endY: endY,
+            startCornerX: startCornerX,
+            startCornerY: startCornerY,
+            endCornerX: endCornerX,
+            endCornerY: endCornerY,
+            deltaX: deltaX,
+            deltaY: deltaY,
+            lineLength: PIE.GradientUtil.distance( startX, startY, endX, endY )
+        }
+    },
+
+    /**
+     * Find the point along a given line (defined by a starting point and an angle), at which
+     * that line is intersected by a perpendicular line extending through another point.
+     * @param x1 - x coord of the starting point
+     * @param y1 - y coord of the starting point
+     * @param angle - angle of the line extending from the starting point (in degrees)
+     * @param x2 - x coord of point along the perpendicular line
+     * @param y2 - y coord of point along the perpendicular line
+     * @return [ x, y ]
+     */
+    perpendicularIntersect: function( x1, y1, angle, x2, y2 ) {
+        // Handle straight vertical and horizontal angles, for performance and to avoid
+        // divide-by-zero errors.
+        if( angle === 0 || angle === 180 ) {
+            return [ x2, y1 ];
+        }
+        else if( angle === 90 || angle === 270 ) {
+            return [ x1, y2 ];
+        }
+        else {
+            // General approach: determine the Ax+By=C formula for each line (the slope of the second
+            // line is the negative inverse of the first) and then solve for where both formulas have
+            // the same x/y values.
+            var a1 = Math.tan( -angle * Math.PI / 180 ),
+                c1 = a1 * x1 - y1,
+                a2 = -1 / a1,
+                c2 = a2 * x2 - y2,
+                d = a2 - a1,
+                endX = ( c2 - c1 ) / d,
+                endY = ( a1 * c2 - a2 * c1 ) / d;
+            return [ endX, endY ];
+        }
+    },
+
+    /**
+     * Find the distance between two points
+     * @param {Number} p1x
+     * @param {Number} p1y
+     * @param {Number} p2x
+     * @param {Number} p2y
+     * @return {Number} the distance
+     */
+    distance: function( p1x, p1y, p2x, p2y ) {
+        var dx = p2x - p1x,
+            dy = p2y - p1y;
+        return Math.abs(
+            dx === 0 ? dy :
+            dy === 0 ? dx :
+            Math.sqrt( dx * dx + dy * dy )
+        );
+    }
+
+};/**
+ * 
+ */
+PIE.Observable = function() {
+    /**
+     * List of registered observer functions
+     */
+    this.observers = [];
+
+    /**
+     * Hash of function ids to their position in the observers list, for fast lookup
+     */
+    this.indexes = {};
+};
+PIE.Observable.prototype = {
+
+    observe: function( fn ) {
+        var id = PIE.Util.getUID( fn ),
+            indexes = this.indexes,
+            observers = this.observers;
+        if( !( id in indexes ) ) {
+            indexes[ id ] = observers.length;
+            observers.push( fn );
+        }
+    },
+
+    unobserve: function( fn ) {
+        var id = PIE.Util.getUID( fn ),
+            indexes = this.indexes;
+        if( id && id in indexes ) {
+            delete this.observers[ indexes[ id ] ];
+            delete indexes[ id ];
+        }
+    },
+
+    fire: function() {
+        var o = this.observers,
+            i = o.length;
+        while( i-- ) {
+            o[ i ] && o[ i ]();
+        }
+    }
+
+};/*
+ * Simple heartbeat timer - this is a brute-force workaround for syncing issues caused by IE not
+ * always firing the onmove and onresize events when elements are moved or resized. We check a few
+ * times every second to make sure the elements have the correct position and size. See Element.js
+ * which adds heartbeat listeners based on the custom -pie-poll flag, which defaults to true in IE8-9
+ * and false elsewhere.
+ */
+
+PIE.Heartbeat = new PIE.Observable();
+PIE.Heartbeat.run = function() {
+    var me = this,
+        interval;
+    if( !me.running ) {
+        interval = doc.documentElement.currentStyle.getAttribute( PIE.CSS_PREFIX + 'poll-interval' ) || 250;
+        (function beat() {
+            me.fire();
+            setTimeout(beat, interval);
+        })();
+        me.running = 1;
+    }
+};
+/**
+ * Create an observable listener for the onunload event
+ */
+(function() {
+    PIE.OnUnload = new PIE.Observable();
+
+    function handleUnload() {
+        PIE.OnUnload.fire();
+        window.detachEvent( 'onunload', handleUnload );
+        window[ 'PIE' ] = null;
+    }
+
+    window.attachEvent( 'onunload', handleUnload );
+
+    /**
+     * Attach an event which automatically gets detached onunload
+     */
+    PIE.OnUnload.attachManagedEvent = function( target, name, handler ) {
+        target.attachEvent( name, handler );
+        this.observe( function() {
+            target.detachEvent( name, handler );
+        } );
+    };
+})()/**
+ * Create a single observable listener for window resize events.
+ */
+PIE.OnResize = new PIE.Observable();
+
+PIE.OnUnload.attachManagedEvent( window, 'onresize', function() { PIE.OnResize.fire(); } );
+/**
+ * Create a single observable listener for scroll events. Used for lazy loading based
+ * on the viewport, and for fixed position backgrounds.
+ */
+(function() {
+    PIE.OnScroll = new PIE.Observable();
+
+    function scrolled() {
+        PIE.OnScroll.fire();
+    }
+
+    PIE.OnUnload.attachManagedEvent( window, 'onscroll', scrolled );
+
+    PIE.OnResize.observe( scrolled );
+})();
+/**
+ * Listen for printing events, destroy all active PIE instances when printing, and
+ * restore them afterward.
+ */
+(function() {
+
+    var elements;
+
+    function beforePrint() {
+        elements = PIE.Element.destroyAll();
+    }
+
+    function afterPrint() {
+        if( elements ) {
+            for( var i = 0, len = elements.length; i < len; i++ ) {
+                PIE[ 'attach' ]( elements[i] );
+            }
+            elements = 0;
+        }
+    }
+
+    if( PIE.ieDocMode < 9 ) {
+        PIE.OnUnload.attachManagedEvent( window, 'onbeforeprint', beforePrint );
+        PIE.OnUnload.attachManagedEvent( window, 'onafterprint', afterPrint );
+    }
+
+})();/**
+ * Create a single observable listener for document mouseup events.
+ */
+PIE.OnMouseup = new PIE.Observable();
+
+PIE.OnUnload.attachManagedEvent( doc, 'onmouseup', function() { PIE.OnMouseup.fire(); } );
+/**
+ * Wrapper for length and percentage style values. The value is immutable. A singleton instance per unique
+ * value is returned from PIE.getLength() - always use that instead of instantiating directly.
+ * @constructor
+ * @param {string} val The CSS string representing the length. It is assumed that this will already have
+ *                 been validated as a valid length or percentage syntax.
+ */
+PIE.Length = (function() {
+    var lengthCalcEl = doc.createElement( 'length-calc' ),
+        parent = doc.body || doc.documentElement,
+        s = lengthCalcEl.style,
+        conversions = {},
+        units = [ 'mm', 'cm', 'in', 'pt', 'pc' ],
+        i = units.length,
+        instances = {};
+
+    s.position = 'absolute';
+    s.top = s.left = '-9999px';
+
+    parent.appendChild( lengthCalcEl );
+    while( i-- ) {
+        s.width = '100' + units[i];
+        conversions[ units[i] ] = lengthCalcEl.offsetWidth / 100;
+    }
+    parent.removeChild( lengthCalcEl );
+
+    // All calcs from here on will use 1em
+    s.width = '1em';
+
+
+    function Length( val ) {
+        this.val = val;
+    }
+    Length.prototype = {
+        /**
+         * Regular expression for matching the length unit
+         * @private
+         */
+        unitRE: /(px|em|ex|mm|cm|in|pt|pc|%)$/,
+
+        /**
+         * Get the numeric value of the length
+         * @return {number} The value
+         */
+        getNumber: function() {
+            var num = this.num,
+                UNDEF;
+            if( num === UNDEF ) {
+                num = this.num = parseFloat( this.val );
+            }
+            return num;
+        },
+
+        /**
+         * Get the unit of the length
+         * @return {string} The unit
+         */
+        getUnit: function() {
+            var unit = this.unit,
+                m;
+            if( !unit ) {
+                m = this.val.match( this.unitRE );
+                unit = this.unit = ( m && m[0] ) || 'px';
+            }
+            return unit;
+        },
+
+        /**
+         * Determine whether this is a percentage length value
+         * @return {boolean}
+         */
+        isPercentage: function() {
+            return this.getUnit() === '%';
+        },
+
+        /**
+         * Resolve this length into a number of pixels.
+         * @param {Element} el - the context element, used to resolve font-relative values
+         * @param {(function():number|number)=} pct100 - the number of pixels that equal a 100% percentage. This can be either a number or a
+         *                  function which will be called to return the number.
+         */
+        pixels: function( el, pct100 ) {
+            var num = this.getNumber(),
+                unit = this.getUnit();
+            switch( unit ) {
+                case "px":
+                    return num;
+                case "%":
+                    return num * ( typeof pct100 === 'function' ? pct100() : pct100 ) / 100;
+                case "em":
+                    return num * this.getEmPixels( el );
+                case "ex":
+                    return num * this.getEmPixels( el ) / 2;
+                default:
+                    return num * conversions[ unit ];
+            }
+        },
+
+        /**
+         * The em and ex units are relative to the font-size of the current element,
+         * however if the font-size is set using non-pixel units then we get that value
+         * rather than a pixel conversion. To get around this, we keep a floating element
+         * with width:1em which we insert into the target element and then read its offsetWidth.
+         * For elements that won't accept a child we insert into the parent node and perform
+         * additional calculation. If the font-size *is* specified in pixels, then we use that
+         * directly to avoid the expensive DOM manipulation.
+         * @param {Element} el
+         * @return {number}
+         */
+        getEmPixels: function( el ) {
+            var fs = el.currentStyle.fontSize,
+                px, parent, me;
+
+            if( fs.indexOf( 'px' ) > 0 ) {
+                return parseFloat( fs );
+            }
+            else if( el.tagName in PIE.childlessElements ) {
+                me = this;
+                parent = el.parentNode;
+                return PIE.getLength( fs ).pixels( parent, function() {
+                    return me.getEmPixels( parent );
+                } );
+            }
+            else {
+                el.appendChild( lengthCalcEl );
+                px = lengthCalcEl.offsetWidth;
+                if( lengthCalcEl.parentNode === el ) { //not sure how this could be false but it sometimes is
+                    el.removeChild( lengthCalcEl );
+                }
+                return px;
+            }
+        }
+    };
+
+
+    /**
+     * Retrieve a PIE.Length instance for the given value. A shared singleton instance is returned for each unique value.
+     * @param {string} val The CSS string representing the length. It is assumed that this will already have
+     *                 been validated as a valid length or percentage syntax.
+     */
+    PIE.getLength = function( val ) {
+        return instances[ val ] || ( instances[ val ] = new Length( val ) );
+    };
+
+    return Length;
+})();
+/**
+ * Wrapper for a CSS3 bg-position value. Takes up to 2 position keywords and 2 lengths/percentages.
+ * @constructor
+ * @param {Array.<PIE.Tokenizer.Token>} tokens The tokens making up the background position value.
+ */
+PIE.BgPosition = (function() {
+
+    var length_fifty = PIE.getLength( '50%' ),
+        vert_idents = { 'top': 1, 'center': 1, 'bottom': 1 },
+        horiz_idents = { 'left': 1, 'center': 1, 'right': 1 };
+
+
+    function BgPosition( tokens ) {
+        this.tokens = tokens;
+    }
+    BgPosition.prototype = {
+        /**
+         * Normalize the values into the form:
+         * [ xOffsetSide, xOffsetLength, yOffsetSide, yOffsetLength ]
+         * where: xOffsetSide is either 'left' or 'right',
+         *        yOffsetSide is either 'top' or 'bottom',
+         *        and x/yOffsetLength are both PIE.Length objects.
+         * @return {Array}
+         */
+        getValues: function() {
+            if( !this._values ) {
+                var tokens = this.tokens,
+                    len = tokens.length,
+                    Tokenizer = PIE.Tokenizer,
+                    identType = Tokenizer.Type,
+                    length_zero = PIE.getLength( '0' ),
+                    type_ident = identType.IDENT,
+                    type_length = identType.LENGTH,
+                    type_percent = identType.PERCENT,
+                    type, value,
+                    vals = [ 'left', length_zero, 'top', length_zero ];
+
+                // If only one value, the second is assumed to be 'center'
+                if( len === 1 ) {
+                    tokens.push( new Tokenizer.Token( type_ident, 'center' ) );
+                    len++;
+                }
+
+                // Two values - CSS2
+                if( len === 2 ) {
+                    // If both idents, they can appear in either order, so switch them if needed
+                    if( type_ident & ( tokens[0].tokenType | tokens[1].tokenType ) &&
+                        tokens[0].tokenValue in vert_idents && tokens[1].tokenValue in horiz_idents ) {
+                        tokens.push( tokens.shift() );
+                    }
+                    if( tokens[0].tokenType & type_ident ) {
+                        if( tokens[0].tokenValue === 'center' ) {
+                            vals[1] = length_fifty;
+                        } else {
+                            vals[0] = tokens[0].tokenValue;
+                        }
+                    }
+                    else if( tokens[0].isLengthOrPercent() ) {
+                        vals[1] = PIE.getLength( tokens[0].tokenValue );
+                    }
+                    if( tokens[1].tokenType & type_ident ) {
+                        if( tokens[1].tokenValue === 'center' ) {
+                            vals[3] = length_fifty;
+                        } else {
+                            vals[2] = tokens[1].tokenValue;
+                        }
+                    }
+                    else if( tokens[1].isLengthOrPercent() ) {
+                        vals[3] = PIE.getLength( tokens[1].tokenValue );
+                    }
+                }
+
+                // Three or four values - CSS3
+                else {
+                    // TODO
+                }
+
+                this._values = vals;
+            }
+            return this._values;
+        },
+
+        /**
+         * Find the coordinates of the background image from the upper-left corner of the background area.
+         * Note that these coordinate values are not rounded.
+         * @param {Element} el
+         * @param {number} width - the width for percentages (background area width minus image width)
+         * @param {number} height - the height for percentages (background area height minus image height)
+         * @return {Object} { x: Number, y: Number }
+         */
+        coords: function( el, width, height ) {
+            var vals = this.getValues(),
+                pxX = vals[1].pixels( el, width ),
+                pxY = vals[3].pixels( el, height );
+
+            return {
+                x: vals[0] === 'right' ? width - pxX : pxX,
+                y: vals[2] === 'bottom' ? height - pxY : pxY
+            };
+        }
+    };
+
+    return BgPosition;
+})();
+/**
+ * Wrapper for a CSS3 background-size value.
+ * @constructor
+ * @param {String|PIE.Length} w The width parameter
+ * @param {String|PIE.Length} h The height parameter, if any
+ */
+PIE.BgSize = (function() {
+
+    var CONTAIN = 'contain',
+        COVER = 'cover',
+        AUTO = 'auto';
+
+
+    function BgSize( w, h ) {
+        this.w = w;
+        this.h = h;
+    }
+    BgSize.prototype = {
+
+        pixels: function( el, areaW, areaH, imgW, imgH ) {
+            var me = this,
+                w = me.w,
+                h = me.h,
+                areaRatio = areaW / areaH,
+                imgRatio = imgW / imgH;
+
+            if ( w === CONTAIN ) {
+                w = imgRatio > areaRatio ? areaW : areaH * imgRatio;
+                h = imgRatio > areaRatio ? areaW / imgRatio : areaH;
+            }
+            else if ( w === COVER ) {
+                w = imgRatio < areaRatio ? areaW : areaH * imgRatio;
+                h = imgRatio < areaRatio ? areaW / imgRatio : areaH;
+            }
+            else if ( w === AUTO ) {
+                h = ( h === AUTO ? imgH : h.pixels( el, areaH ) );
+                w = h * imgRatio;
+            }
+            else {
+                w = w.pixels( el, areaW );
+                h = ( h === AUTO ? w / imgRatio : h.pixels( el, areaH ) );
+            }
+
+            return { w: w, h: h };
+        }
+
+    };
+
+    BgSize.DEFAULT = new BgSize( AUTO, AUTO );
+
+    return BgSize;
+})();
+/**
+ * Wrapper for angle values; handles conversion to degrees from all allowed angle units
+ * @constructor
+ * @param {string} val The raw CSS value for the angle. It is assumed it has been pre-validated.
+ */
+PIE.Angle = (function() {
+    function Angle( val ) {
+        this.val = val;
+    }
+    Angle.prototype = {
+        unitRE: /[a-z]+$/i,
+
+        /**
+         * @return {string} The unit of the angle value
+         */
+        getUnit: function() {
+            return this._unit || ( this._unit = this.val.match( this.unitRE )[0].toLowerCase() );
+        },
+
+        /**
+         * Get the numeric value of the angle in degrees.
+         * @return {number} The degrees value
+         */
+        degrees: function() {
+            var deg = this._deg, u, n;
+            if( deg === undefined ) {
+                u = this.getUnit();
+                n = parseFloat( this.val, 10 );
+                deg = this._deg = ( u === 'deg' ? n : u === 'rad' ? n / Math.PI * 180 : u === 'grad' ? n / 400 * 360 : u === 'turn' ? n * 360 : 0 );
+            }
+            return deg;
+        }
+    };
+
+    return Angle;
+})();/**
+ * Abstraction for colors values. Allows detection of rgba values. A singleton instance per unique
+ * value is returned from PIE.getColor() - always use that instead of instantiating directly.
+ * @constructor
+ * @param {string} val The raw CSS string value for the color
+ */
+PIE.Color = (function() {
+    var instances = {};
+
+    function Color( val ) {
+        this.val = val;
+    }
+
+    /**
+     * Regular expression for matching rgba colors and extracting their components
+     * @type {RegExp}
+     */
+    Color.rgbaRE = /\s*rgba\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d+|\d*\.\d+)\s*\)\s*/;
+
+    Color.names = {
+        "aliceblue":"F0F8FF", "antiquewhite":"FAEBD7", "aqua":"0FF",
+        "aquamarine":"7FFFD4", "azure":"F0FFFF", "beige":"F5F5DC",
+        "bisque":"FFE4C4", "black":"000", "blanchedalmond":"FFEBCD",
+        "blue":"00F", "blueviolet":"8A2BE2", "brown":"A52A2A",
+        "burlywood":"DEB887", "cadetblue":"5F9EA0", "chartreuse":"7FFF00",
+        "chocolate":"D2691E", "coral":"FF7F50", "cornflowerblue":"6495ED",
+        "cornsilk":"FFF8DC", "crimson":"DC143C", "cyan":"0FF",
+        "darkblue":"00008B", "darkcyan":"008B8B", "darkgoldenrod":"B8860B",
+        "darkgray":"A9A9A9", "darkgreen":"006400", "darkkhaki":"BDB76B",
+        "darkmagenta":"8B008B", "darkolivegreen":"556B2F", "darkorange":"FF8C00",
+        "darkorchid":"9932CC", "darkred":"8B0000", "darksalmon":"E9967A",
+        "darkseagreen":"8FBC8F", "darkslateblue":"483D8B", "darkslategray":"2F4F4F",
+        "darkturquoise":"00CED1", "darkviolet":"9400D3", "deeppink":"FF1493",
+        "deepskyblue":"00BFFF", "dimgray":"696969", "dodgerblue":"1E90FF",
+        "firebrick":"B22222", "floralwhite":"FFFAF0", "forestgreen":"228B22",
+        "fuchsia":"F0F", "gainsboro":"DCDCDC", "ghostwhite":"F8F8FF",
+        "gold":"FFD700", "goldenrod":"DAA520", "gray":"808080",
+        "green":"008000", "greenyellow":"ADFF2F", "honeydew":"F0FFF0",
+        "hotpink":"FF69B4", "indianred":"CD5C5C", "indigo":"4B0082",
+        "ivory":"FFFFF0", "khaki":"F0E68C", "lavender":"E6E6FA",
+        "lavenderblush":"FFF0F5", "lawngreen":"7CFC00", "lemonchiffon":"FFFACD",
+        "lightblue":"ADD8E6", "lightcoral":"F08080", "lightcyan":"E0FFFF",
+        "lightgoldenrodyellow":"FAFAD2", "lightgreen":"90EE90", "lightgrey":"D3D3D3",
+        "lightpink":"FFB6C1", "lightsalmon":"FFA07A", "lightseagreen":"20B2AA",
+        "lightskyblue":"87CEFA", "lightslategray":"789", "lightsteelblue":"B0C4DE",
+        "lightyellow":"FFFFE0", "lime":"0F0", "limegreen":"32CD32",
+        "linen":"FAF0E6", "magenta":"F0F", "maroon":"800000",
+        "mediumauqamarine":"66CDAA", "mediumblue":"0000CD", "mediumorchid":"BA55D3",
+        "mediumpurple":"9370D8", "mediumseagreen":"3CB371", "mediumslateblue":"7B68EE",
+        "mediumspringgreen":"00FA9A", "mediumturquoise":"48D1CC", "mediumvioletred":"C71585",
+        "midnightblue":"191970", "mintcream":"F5FFFA", "mistyrose":"FFE4E1",
+        "moccasin":"FFE4B5", "navajowhite":"FFDEAD", "navy":"000080",
+        "oldlace":"FDF5E6", "olive":"808000", "olivedrab":"688E23",
+        "orange":"FFA500", "orangered":"FF4500", "orchid":"DA70D6",
+        "palegoldenrod":"EEE8AA", "palegreen":"98FB98", "paleturquoise":"AFEEEE",
+        "palevioletred":"D87093", "papayawhip":"FFEFD5", "peachpuff":"FFDAB9",
+        "peru":"CD853F", "pink":"FFC0CB", "plum":"DDA0DD",
+        "powderblue":"B0E0E6", "purple":"800080", "red":"F00",
+        "rosybrown":"BC8F8F", "royalblue":"4169E1", "saddlebrown":"8B4513",
+        "salmon":"FA8072", "sandybrown":"F4A460", "seagreen":"2E8B57",
+        "seashell":"FFF5EE", "sienna":"A0522D", "silver":"C0C0C0",
+        "skyblue":"87CEEB", "slateblue":"6A5ACD", "slategray":"708090",
+        "snow":"FFFAFA", "springgreen":"00FF7F", "steelblue":"4682B4",
+        "tan":"D2B48C", "teal":"008080", "thistle":"D8BFD8",
+        "tomato":"FF6347", "turquoise":"40E0D0", "violet":"EE82EE",
+        "wheat":"F5DEB3", "white":"FFF", "whitesmoke":"F5F5F5",
+        "yellow":"FF0", "yellowgreen":"9ACD32"
+    };
+
+    Color.prototype = {
+        /**
+         * @private
+         */
+        parse: function() {
+            if( !this._color ) {
+                var me = this,
+                    v = me.val,
+                    vLower,
+                    m = v.match( Color.rgbaRE );
+                if( m ) {
+                    me._color = 'rgb(' + m[1] + ',' + m[2] + ',' + m[3] + ')';
+                    me._alpha = parseFloat( m[4] );
+                }
+                else {
+                    if( ( vLower = v.toLowerCase() ) in Color.names ) {
+                        v = '#' + Color.names[vLower];
+                    }
+                    me._color = v;
+                    me._alpha = ( v === 'transparent' ? 0 : 1 );
+                }
+            }
+        },
+
+        /**
+         * Retrieve the value of the color in a format usable by IE natively. This will be the same as
+         * the raw input value, except for rgba values which will be converted to an rgb value.
+         * @param {Element} el The context element, used to get 'currentColor' keyword value.
+         * @return {string} Color value
+         */
+        colorValue: function( el ) {
+            this.parse();
+            return this._color === 'currentColor' ? el.currentStyle.color : this._color;
+        },
+
+        /**
+         * Retrieve the alpha value of the color. Will be 1 for all values except for rgba values
+         * with an alpha component.
+         * @return {number} The alpha value, from 0 to 1.
+         */
+        alpha: function() {
+            this.parse();
+            return this._alpha;
+        }
+    };
+
+
+    /**
+     * Retrieve a PIE.Color instance for the given value. A shared singleton instance is returned for each unique value.
+     * @param {string} val The CSS string representing the color. It is assumed that this will already have
+     *                 been validated as a valid color syntax.
+     */
+    PIE.getColor = function(val) {
+        return instances[ val ] || ( instances[ val ] = new Color( val ) );
+    };
+
+    return Color;
+})();/**
+ * A tokenizer for CSS value strings.
+ * @constructor
+ * @param {string} css The CSS value string
+ */
+PIE.Tokenizer = (function() {
+    function Tokenizer( css ) {
+        this.css = css;
+        this.ch = 0;
+        this.tokens = [];
+        this.tokenIndex = 0;
+    }
+
+    /**
+     * Enumeration of token type constants.
+     * @enum {number}
+     */
+    var Type = Tokenizer.Type = {
+        ANGLE: 1,
+        CHARACTER: 2,
+        COLOR: 4,
+        DIMEN: 8,
+        FUNCTION: 16,
+        IDENT: 32,
+        LENGTH: 64,
+        NUMBER: 128,
+        OPERATOR: 256,
+        PERCENT: 512,
+        STRING: 1024,
+        URL: 2048
+    };
+
+    /**
+     * A single token
+     * @constructor
+     * @param {number} type The type of the token - see PIE.Tokenizer.Type
+     * @param {string} value The value of the token
+     */
+    Tokenizer.Token = function( type, value ) {
+        this.tokenType = type;
+        this.tokenValue = value;
+    };
+    Tokenizer.Token.prototype = {
+        isLength: function() {
+            return this.tokenType & Type.LENGTH || ( this.tokenType & Type.NUMBER && this.tokenValue === '0' );
+        },
+        isLengthOrPercent: function() {
+            return this.isLength() || this.tokenType & Type.PERCENT;
+        }
+    };
+
+    Tokenizer.prototype = {
+        whitespace: /\s/,
+        number: /^[\+\-]?(\d*\.)?\d+/,
+        url: /^url\(\s*("([^"]*)"|'([^']*)'|([!#$%&*-~]*))\s*\)/i,
+        ident: /^\-?[_a-z][\w-]*/i,
+        string: /^("([^"]*)"|'([^']*)')/,
+        operator: /^[\/,]/,
+        hash: /^#[\w]+/,
+        hashColor: /^#([\da-f]{6}|[\da-f]{3})/i,
+
+        unitTypes: {
+            'px': Type.LENGTH, 'em': Type.LENGTH, 'ex': Type.LENGTH,
+            'mm': Type.LENGTH, 'cm': Type.LENGTH, 'in': Type.LENGTH,
+            'pt': Type.LENGTH, 'pc': Type.LENGTH,
+            'deg': Type.ANGLE, 'rad': Type.ANGLE, 'grad': Type.ANGLE
+        },
+
+        colorFunctions: {
+            'rgb': 1, 'rgba': 1, 'hsl': 1, 'hsla': 1
+        },
+
+
+        /**
+         * Advance to and return the next token in the CSS string. If the end of the CSS string has
+         * been reached, null will be returned.
+         * @param {boolean} forget - if true, the token will not be stored for the purposes of backtracking with prev().
+         * @return {PIE.Tokenizer.Token}
+         */
+        next: function( forget ) {
+            var css, ch, firstChar, match, val,
+                me = this;
+
+            function newToken( type, value ) {
+                var tok = new Tokenizer.Token( type, value );
+                if( !forget ) {
+                    me.tokens.push( tok );
+                    me.tokenIndex++;
+                }
+                return tok;
+            }
+            function failure() {
+                me.tokenIndex++;
+                return null;
+            }
+
+            // In case we previously backed up, return the stored token in the next slot
+            if( this.tokenIndex < this.tokens.length ) {
+                return this.tokens[ this.tokenIndex++ ];
+            }
+
+            // Move past leading whitespace characters
+            while( this.whitespace.test( this.css.charAt( this.ch ) ) ) {
+                this.ch++;
+            }
+            if( this.ch >= this.css.length ) {
+                return failure();
+            }
+
+            ch = this.ch;
+            css = this.css.substring( this.ch );
+            firstChar = css.charAt( 0 );
+            switch( firstChar ) {
+                case '#':
+                    if( match = css.match( this.hashColor ) ) {
+                        this.ch += match[0].length;
+                        return newToken( Type.COLOR, match[0] );
+                    }
+                    break;
+
+                case '"':
+                case "'":
+                    if( match = css.match( this.string ) ) {
+                        this.ch += match[0].length;
+                        return newToken( Type.STRING, match[2] || match[3] || '' );
+                    }
+                    break;
+
+                case "/":
+                case ",":
+                    this.ch++;
+                    return newToken( Type.OPERATOR, firstChar );
+
+                case 'u':
+                    if( match = css.match( this.url ) ) {
+                        this.ch += match[0].length;
+                        return newToken( Type.URL, match[2] || match[3] || match[4] || '' );
+                    }
+            }
+
+            // Numbers and values starting with numbers
+            if( match = css.match( this.number ) ) {
+                val = match[0];
+                this.ch += val.length;
+
+                // Check if it is followed by a unit
+                if( css.charAt( val.length ) === '%' ) {
+                    this.ch++;
+                    return newToken( Type.PERCENT, val + '%' );
+                }
+                if( match = css.substring( val.length ).match( this.ident ) ) {
+                    val += match[0];
+                    this.ch += match[0].length;
+                    return newToken( this.unitTypes[ match[0].toLowerCase() ] || Type.DIMEN, val );
+                }
+
+                // Plain ol' number
+                return newToken( Type.NUMBER, val );
+            }
+
+            // Identifiers
+            if( match = css.match( this.ident ) ) {
+                val = match[0];
+                this.ch += val.length;
+
+                // Named colors
+                if( val.toLowerCase() in PIE.Color.names || val === 'currentColor' || val === 'transparent' ) {
+                    return newToken( Type.COLOR, val );
+                }
+
+                // Functions
+                if( css.charAt( val.length ) === '(' ) {
+                    this.ch++;
+
+                    // Color values in function format: rgb, rgba, hsl, hsla
+                    if( val.toLowerCase() in this.colorFunctions ) {
+                        function isNum( tok ) {
+                            return tok && tok.tokenType & Type.NUMBER;
+                        }
+                        function isNumOrPct( tok ) {
+                            return tok && ( tok.tokenType & ( Type.NUMBER | Type.PERCENT ) );
+                        }
+                        function isValue( tok, val ) {
+                            return tok && tok.tokenValue === val;
+                        }
+                        function next() {
+                            return me.next( 1 );
+                        }
+
+                        if( ( val.charAt(0) === 'r' ? isNumOrPct( next() ) : isNum( next() ) ) &&
+                            isValue( next(), ',' ) &&
+                            isNumOrPct( next() ) &&
+                            isValue( next(), ',' ) &&
+                            isNumOrPct( next() ) &&
+                            ( val === 'rgb' || val === 'hsa' || (
+                                isValue( next(), ',' ) &&
+                                isNum( next() )
+                            ) ) &&
+                            isValue( next(), ')' ) ) {
+                            return newToken( Type.COLOR, this.css.substring( ch, this.ch ) );
+                        }
+                        return failure();
+                    }
+
+                    return newToken( Type.FUNCTION, val );
+                }
+
+                // Other identifier
+                return newToken( Type.IDENT, val );
+            }
+
+            // Standalone character
+            this.ch++;
+            return newToken( Type.CHARACTER, firstChar );
+        },
+
+        /**
+         * Determine whether there is another token
+         * @return {boolean}
+         */
+        hasNext: function() {
+            var next = this.next();
+            this.prev();
+            return !!next;
+        },
+
+        /**
+         * Back up and return the previous token
+         * @return {PIE.Tokenizer.Token}
+         */
+        prev: function() {
+            return this.tokens[ this.tokenIndex-- - 2 ];
+        },
+
+        /**
+         * Retrieve all the tokens in the CSS string
+         * @return {Array.<PIE.Tokenizer.Token>}
+         */
+        all: function() {
+            while( this.next() ) {}
+            return this.tokens;
+        },
+
+        /**
+         * Return a list of tokens from the current position until the given function returns
+         * true. The final token will not be included in the list.
+         * @param {function():boolean} func - test function
+         * @param {boolean} require - if true, then if the end of the CSS string is reached
+         *        before the test function returns true, null will be returned instead of the
+         *        tokens that have been found so far.
+         * @return {Array.<PIE.Tokenizer.Token>}
+         */
+        until: function( func, require ) {
+            var list = [], t, hit;
+            while( t = this.next() ) {
+                if( func( t ) ) {
+                    hit = true;
+                    this.prev();
+                    break;
+                }
+                list.push( t );
+            }
+            return require && !hit ? null : list;
+        }
+    };
+
+    return Tokenizer;
+})();/**
+ * Handles calculating, caching, and detecting changes to size and position of the element.
+ * @constructor
+ * @param {Element} el the target element
+ */
+PIE.BoundsInfo = function( el ) {
+    this.targetElement = el;
+};
+PIE.BoundsInfo.prototype = {
+
+    _locked: 0,
+
+    positionChanged: function() {
+        var last = this._lastBounds,
+            bounds;
+        return !last || ( ( bounds = this.getBounds() ) && ( last.x !== bounds.x || last.y !== bounds.y ) );
+    },
+
+    sizeChanged: function() {
+        var last = this._lastBounds,
+            bounds;
+        return !last || ( ( bounds = this.getBounds() ) && ( last.w !== bounds.w || last.h !== bounds.h ) );
+    },
+
+    getLiveBounds: function() {
+        var el = this.targetElement,
+            rect = el.getBoundingClientRect(),
+            isIE9 = PIE.ieDocMode === 9,
+            isIE7 = PIE.ieVersion === 7,
+            width = rect.right - rect.left;
+        return {
+            x: rect.left,
+            y: rect.top,
+            // In some cases scrolling the page will cause IE9 to report incorrect dimensions
+            // in the rect returned by getBoundingClientRect, so we must query offsetWidth/Height
+            // instead. Also IE7 is inconsistent in using logical vs. device pixels in measurements
+            // so we must calculate the ratio and use it in certain places as a position adjustment.
+            w: isIE9 || isIE7 ? el.offsetWidth : width,
+            h: isIE9 || isIE7 ? el.offsetHeight : rect.bottom - rect.top,
+            logicalZoomRatio: ( isIE7 && width ) ? el.offsetWidth / width : 1
+        };
+    },
+
+    getBounds: function() {
+        return this._locked ? 
+                ( this._lockedBounds || ( this._lockedBounds = this.getLiveBounds() ) ) :
+                this.getLiveBounds();
+    },
+
+    hasBeenQueried: function() {
+        return !!this._lastBounds;
+    },
+
+    lock: function() {
+        ++this._locked;
+    },
+
+    unlock: function() {
+        if( !--this._locked ) {
+            if( this._lockedBounds ) this._lastBounds = this._lockedBounds;
+            this._lockedBounds = null;
+        }
+    }
+
+};
+(function() {
+
+function cacheWhenLocked( fn ) {
+    var uid = PIE.Util.getUID( fn );
+    return function() {
+        if( this._locked ) {
+            var cache = this._lockedValues || ( this._lockedValues = {} );
+            return ( uid in cache ) ? cache[ uid ] : ( cache[ uid ] = fn.call( this ) );
+        } else {
+            return fn.call( this );
+        }
+    }
+}
+
+
+PIE.StyleInfoBase = {
+
+    _locked: 0,
+
+    /**
+     * Create a new StyleInfo class, with the standard constructor, and augmented by
+     * the StyleInfoBase's members.
+     * @param proto
+     */
+    newStyleInfo: function( proto ) {
+        function StyleInfo( el ) {
+            this.targetElement = el;
+            this._lastCss = this.getCss();
+        }
+        PIE.Util.merge( StyleInfo.prototype, PIE.StyleInfoBase, proto );
+        StyleInfo._propsCache = {};
+        return StyleInfo;
+    },
+
+    /**
+     * Get an object representation of the target CSS style, caching it for each unique
+     * CSS value string.
+     * @return {Object}
+     */
+    getProps: function() {
+        var css = this.getCss(),
+            cache = this.constructor._propsCache;
+        return css ? ( css in cache ? cache[ css ] : ( cache[ css ] = this.parseCss( css ) ) ) : null;
+    },
+
+    /**
+     * Get the raw CSS value for the target style
+     * @return {string}
+     */
+    getCss: cacheWhenLocked( function() {
+        var el = this.targetElement,
+            ctor = this.constructor,
+            s = el.style,
+            cs = el.currentStyle,
+            cssProp = this.cssProperty,
+            styleProp = this.styleProperty,
+            prefixedCssProp = ctor._prefixedCssProp || ( ctor._prefixedCssProp = PIE.CSS_PREFIX + cssProp ),
+            prefixedStyleProp = ctor._prefixedStyleProp || ( ctor._prefixedStyleProp = PIE.STYLE_PREFIX + styleProp.charAt(0).toUpperCase() + styleProp.substring(1) );
+        return s[ prefixedStyleProp ] || cs.getAttribute( prefixedCssProp ) || s[ styleProp ] || cs.getAttribute( cssProp );
+    } ),
+
+    /**
+     * Determine whether the target CSS style is active.
+     * @return {boolean}
+     */
+    isActive: cacheWhenLocked( function() {
+        return !!this.getProps();
+    } ),
+
+    /**
+     * Determine whether the target CSS style has changed since the last time it was used.
+     * @return {boolean}
+     */
+    changed: cacheWhenLocked( function() {
+        var currentCss = this.getCss(),
+            changed = currentCss !== this._lastCss;
+        this._lastCss = currentCss;
+        return changed;
+    } ),
+
+    cacheWhenLocked: cacheWhenLocked,
+
+    lock: function() {
+        ++this._locked;
+    },
+
+    unlock: function() {
+        if( !--this._locked ) {
+            delete this._lockedValues;
+        }
+    }
+};
+
+})();/**
+ * Handles parsing, caching, and detecting changes to background (and -pie-background) CSS
+ * @constructor
+ * @param {Element} el the target element
+ */
+PIE.BackgroundStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
+
+    cssProperty: PIE.CSS_PREFIX + 'background',
+    styleProperty: PIE.STYLE_PREFIX + 'Background',
+
+    attachIdents: { 'scroll':1, 'fixed':1, 'local':1 },
+    repeatIdents: { 'repeat-x':1, 'repeat-y':1, 'repeat':1, 'no-repeat':1 },
+    originAndClipIdents: { 'padding-box':1, 'border-box':1, 'content-box':1 },
+    positionIdents: { 'top':1, 'right':1, 'bottom':1, 'left':1, 'center':1 },
+    sizeIdents: { 'contain':1, 'cover':1 },
+    propertyNames: {
+        CLIP: 'backgroundClip',
+        COLOR: 'backgroundColor',
+        IMAGE: 'backgroundImage',
+        ORIGIN: 'backgroundOrigin',
+        POSITION: 'backgroundPosition',
+        REPEAT: 'backgroundRepeat',
+        SIZE: 'backgroundSize'
+    },
+
+    /**
+     * For background styles, we support the -pie-background property but fall back to the standard
+     * backround* properties.  The reason we have to use the prefixed version is that IE natively
+     * parses the standard properties and if it sees something it doesn't know how to parse, for example
+     * multiple values or gradient definitions, it will throw that away and not make it available through
+     * currentStyle.
+     *
+     * Format of return object:
+     * {
+     *     color: <PIE.Color>,
+     *     bgImages: [
+     *         {
+     *             imgType: 'image',
+     *             imgUrl: 'image.png',
+     *             imgRepeat: <'no-repeat' | 'repeat-x' | 'repeat-y' | 'repeat'>,
+     *             bgPosition: <PIE.BgPosition>,
+     *             bgAttachment: <'scroll' | 'fixed' | 'local'>,
+     *             bgOrigin: <'border-box' | 'padding-box' | 'content-box'>,
+     *             bgClip: <'border-box' | 'padding-box'>,
+     *             bgSize: <PIE.BgSize>,
+     *             origString: 'url(img.png) no-repeat top left'
+     *         },
+     *         {
+     *             imgType: 'linear-gradient',
+     *             gradientStart: <PIE.BgPosition>,
+     *             angle: <PIE.Angle>,
+     *             stops: [
+     *                 { color: <PIE.Color>, offset: <PIE.Length> },
+     *                 { color: <PIE.Color>, offset: <PIE.Length> }, ...
+     *             ]
+     *         }
+     *     ]
+     * }
+     * @param {String} css
+     * @override
+     */
+    parseCss: function( css ) {
+        var el = this.targetElement,
+            cs = el.currentStyle,
+            tokenizer, token, image,
+            tok_type = PIE.Tokenizer.Type,
+            type_operator = tok_type.OPERATOR,
+            type_ident = tok_type.IDENT,
+            type_color = tok_type.COLOR,
+            tokType, tokVal,
+            beginCharIndex = 0,
+            positionIdents = this.positionIdents,
+            gradient, stop, width, height,
+            props = { bgImages: [] };
+
+        function isBgPosToken( token ) {
+            return token && token.isLengthOrPercent() || ( token.tokenType & type_ident && token.tokenValue in positionIdents );
+        }
+
+        function sizeToken( token ) {
+            return token && ( ( token.isLengthOrPercent() && PIE.getLength( token.tokenValue ) ) || ( token.tokenValue === 'auto' && 'auto' ) );
+        }
+
+        // If the CSS3-specific -pie-background property is present, parse it
+        if( this.getCss3() ) {
+            tokenizer = new PIE.Tokenizer( css );
+            image = {};
+
+            while( token = tokenizer.next() ) {
+                tokType = token.tokenType;
+                tokVal = token.tokenValue;
+
+                if( !image.imgType && tokType & tok_type.FUNCTION && tokVal === 'linear-gradient' ) {
+                    gradient = { stops: [], imgType: tokVal };
+                    stop = {};
+                    while( token = tokenizer.next() ) {
+                        tokType = token.tokenType;
+                        tokVal = token.tokenValue;
+
+                        // If we reached the end of the function and had at least 2 stops, flush the info
+                        if( tokType & tok_type.CHARACTER && tokVal === ')' ) {
+                            if( stop.color ) {
+                                gradient.stops.push( stop );
+                            }
+                            if( gradient.stops.length > 1 ) {
+                                PIE.Util.merge( image, gradient );
+                            }
+                            break;
+                        }
+
+                        // Color stop - must start with color
+                        if( tokType & type_color ) {
+                            // if we already have an angle/position, make sure that the previous token was a comma
+                            if( gradient.angle || gradient.gradientStart ) {
+                                token = tokenizer.prev();
+                                if( token.tokenType !== type_operator ) {
+                                    break; //fail
+                                }
+                                tokenizer.next();
+                            }
+
+                            stop = {
+                                color: PIE.getColor( tokVal )
+                            };
+                            // check for offset following color
+                            token = tokenizer.next();
+                            if( token.isLengthOrPercent() ) {
+                                stop.offset = PIE.getLength( token.tokenValue );
+                            } else {
+                                tokenizer.prev();
+                            }
+                        }
+                        // Angle - can only appear in first spot
+                        else if( tokType & tok_type.ANGLE && !gradient.angle && !stop.color && !gradient.stops.length ) {
+                            gradient.angle = new PIE.Angle( token.tokenValue );
+                        }
+                        else if( isBgPosToken( token ) && !gradient.gradientStart && !stop.color && !gradient.stops.length ) {
+                            tokenizer.prev();
+                            gradient.gradientStart = new PIE.BgPosition(
+                                tokenizer.until( function( t ) {
+                                    return !isBgPosToken( t );
+                                }, false )
+                            );
+                        }
+                        else if( tokType & type_operator && tokVal === ',' ) {
+                            if( stop.color ) {
+                                gradient.stops.push( stop );
+                                stop = {};
+                            }
+                        }
+                        else {
+                            // Found something we didn't recognize; fail without adding image
+                            break;
+                        }
+                    }
+                }
+                else if( !image.imgType && tokType & tok_type.URL ) {
+                    image.imgUrl = tokVal;
+                    image.imgType = 'image';
+                }
+                else if( isBgPosToken( token ) && !image.bgPosition ) {
+                    tokenizer.prev();
+                    image.bgPosition = new PIE.BgPosition(
+                        tokenizer.until( function( t ) {
+                            return !isBgPosToken( t );
+                        }, false )
+                    );
+                }
+                else if( tokType & type_ident ) {
+                    if( tokVal in this.repeatIdents && !image.imgRepeat ) {
+                        image.imgRepeat = tokVal;
+                    }
+                    else if( tokVal in this.originAndClipIdents && !image.bgOrigin ) {
+                        image.bgOrigin = tokVal;
+                        if( ( token = tokenizer.next() ) && ( token.tokenType & type_ident ) &&
+                            token.tokenValue in this.originAndClipIdents ) {
+                            image.bgClip = token.tokenValue;
+                        } else {
+                            image.bgClip = tokVal;
+                            tokenizer.prev();
+                        }
+                    }
+                    else if( tokVal in this.attachIdents && !image.bgAttachment ) {
+                        image.bgAttachment = tokVal;
+                    }
+                    else {
+                        return null;
+                    }
+                }
+                else if( tokType & type_color && !props.color ) {
+                    props.color = PIE.getColor( tokVal );
+                }
+                else if( tokType & type_operator && tokVal === '/' && !image.bgSize && image.bgPosition ) {
+                    // background size
+                    token = tokenizer.next();
+                    if( token.tokenType & type_ident && token.tokenValue in this.sizeIdents ) {
+                        image.bgSize = new PIE.BgSize( token.tokenValue );
+                    }
+                    else if( width = sizeToken( token ) ) {
+                        height = sizeToken( tokenizer.next() );
+                        if ( !height ) {
+                            height = width;
+                            tokenizer.prev();
+                        }
+                        image.bgSize = new PIE.BgSize( width, height );
+                    }
+                    else {
+                        return null;
+                    }
+                }
+                // new layer
+                else if( tokType & type_operator && tokVal === ',' && image.imgType ) {
+                    image.origString = css.substring( beginCharIndex, tokenizer.ch - 1 );
+                    beginCharIndex = tokenizer.ch;
+                    props.bgImages.push( image );
+                    image = {};
+                }
+                else {
+                    // Found something unrecognized; chuck everything
+                    return null;
+                }
+            }
+
+            // leftovers
+            if( image.imgType ) {
+                image.origString = css.substring( beginCharIndex );
+                props.bgImages.push( image );
+            }
+        }
+
+        // Otherwise, use the standard background properties; let IE give us the values rather than parsing them
+        else {
+            this.withActualBg( PIE.ieDocMode < 9 ?
+                function() {
+                    var propNames = this.propertyNames,
+                        posX = cs[propNames.POSITION + 'X'],
+                        posY = cs[propNames.POSITION + 'Y'],
+                        img = cs[propNames.IMAGE],
+                        color = cs[propNames.COLOR];
+
+                    if( color !== 'transparent' ) {
+                        props.color = PIE.getColor( color )
+                    }
+                    if( img !== 'none' ) {
+                        props.bgImages = [ {
+                            imgType: 'image',
+                            imgUrl: new PIE.Tokenizer( img ).next().tokenValue,
+                            imgRepeat: cs[propNames.REPEAT],
+                            bgPosition: new PIE.BgPosition( new PIE.Tokenizer( posX + ' ' + posY ).all() )
+                        } ];
+                    }
+                } :
+                function() {
+                    var propNames = this.propertyNames,
+                        splitter = /\s*,\s*/,
+                        images = cs[propNames.IMAGE].split( splitter ),
+                        color = cs[propNames.COLOR],
+                        repeats, positions, origins, clips, sizes, i, len, image, sizeParts;
+
+                    if( color !== 'transparent' ) {
+                        props.color = PIE.getColor( color )
+                    }
+
+                    len = images.length;
+                    if( len && images[0] !== 'none' ) {
+                        repeats = cs[propNames.REPEAT].split( splitter );
+                        positions = cs[propNames.POSITION].split( splitter );
+                        origins = cs[propNames.ORIGIN].split( splitter );
+                        clips = cs[propNames.CLIP].split( splitter );
+                        sizes = cs[propNames.SIZE].split( splitter );
+
+                        props.bgImages = [];
+                        for( i = 0; i < len; i++ ) {
+                            image = images[ i ];
+                            if( image && image !== 'none' ) {
+                                sizeParts = sizes[i].split( ' ' );
+                                props.bgImages.push( {
+                                    origString: image + ' ' + repeats[ i ] + ' ' + positions[ i ] + ' / ' + sizes[ i ] + ' ' +
+                                                origins[ i ] + ' ' + clips[ i ],
+                                    imgType: 'image',
+                                    imgUrl: new PIE.Tokenizer( image ).next().tokenValue,
+                                    imgRepeat: repeats[ i ],
+                                    bgPosition: new PIE.BgPosition( new PIE.Tokenizer( positions[ i ] ).all() ),
+                                    bgOrigin: origins[ i ],
+                                    bgClip: clips[ i ],
+                                    bgSize: new PIE.BgSize( sizeParts[ 0 ], sizeParts[ 1 ] )
+                                } );
+                            }
+                        }
+                    }
+                }
+            );
+        }
+
+        return ( props.color || props.bgImages[0] ) ? props : null;
+    },
+
+    /**
+     * Execute a function with the actual background styles (not overridden with runtimeStyle
+     * properties set by the renderers) available via currentStyle.
+     * @param fn
+     */
+    withActualBg: function( fn ) {
+        var isIE9 = PIE.ieDocMode > 8,
+            propNames = this.propertyNames,
+            rs = this.targetElement.runtimeStyle,
+            rsImage = rs[propNames.IMAGE],
+            rsColor = rs[propNames.COLOR],
+            rsRepeat = rs[propNames.REPEAT],
+            rsClip, rsOrigin, rsSize, rsPosition, ret;
+
+        if( rsImage ) rs[propNames.IMAGE] = '';
+        if( rsColor ) rs[propNames.COLOR] = '';
+        if( rsRepeat ) rs[propNames.REPEAT] = '';
+        if( isIE9 ) {
+            rsClip = rs[propNames.CLIP];
+            rsOrigin = rs[propNames.ORIGIN];
+            rsPosition = rs[propNames.POSITION];
+            rsSize = rs[propNames.SIZE];
+            if( rsClip ) rs[propNames.CLIP] = '';
+            if( rsOrigin ) rs[propNames.ORIGIN] = '';
+            if( rsPosition ) rs[propNames.POSITION] = '';
+            if( rsSize ) rs[propNames.SIZE] = '';
+        }
+
+        ret = fn.call( this );
+
+        if( rsImage ) rs[propNames.IMAGE] = rsImage;
+        if( rsColor ) rs[propNames.COLOR] = rsColor;
+        if( rsRepeat ) rs[propNames.REPEAT] = rsRepeat;
+        if( isIE9 ) {
+            if( rsClip ) rs[propNames.CLIP] = rsClip;
+            if( rsOrigin ) rs[propNames.ORIGIN] = rsOrigin;
+            if( rsPosition ) rs[propNames.POSITION] = rsPosition;
+            if( rsSize ) rs[propNames.SIZE] = rsSize;
+        }
+
+        return ret;
+    },
+
+    getCss: PIE.StyleInfoBase.cacheWhenLocked( function() {
+        return this.getCss3() ||
+               this.withActualBg( function() {
+                   var cs = this.targetElement.currentStyle,
+                       propNames = this.propertyNames;
+                   return cs[propNames.COLOR] + ' ' + cs[propNames.IMAGE] + ' ' + cs[propNames.REPEAT] + ' ' +
+                   cs[propNames.POSITION + 'X'] + ' ' + cs[propNames.POSITION + 'Y'];
+               } );
+    } ),
+
+    getCss3: PIE.StyleInfoBase.cacheWhenLocked( function() {
+        var el = this.targetElement;
+        return el.style[ this.styleProperty ] || el.currentStyle.getAttribute( this.cssProperty );
+    } ),
+
+    /**
+     * Tests if style.PiePngFix or the -pie-png-fix property is set to true in IE6.
+     */
+    isPngFix: function() {
+        var val = 0, el;
+        if( PIE.ieVersion < 7 ) {
+            el = this.targetElement;
+            val = ( '' + ( el.style[ PIE.STYLE_PREFIX + 'PngFix' ] || el.currentStyle.getAttribute( PIE.CSS_PREFIX + 'png-fix' ) ) === 'true' );
+        }
+        return val;
+    },
+    
+    /**
+     * The isActive logic is slightly different, because getProps() always returns an object
+     * even if it is just falling back to the native background properties.  But we only want
+     * to report is as being "active" if either the -pie-background override property is present
+     * and parses successfully or '-pie-png-fix' is set to true in IE6.
+     */
+    isActive: PIE.StyleInfoBase.cacheWhenLocked( function() {
+        return (this.getCss3() || this.isPngFix()) && !!this.getProps();
+    } )
+
+} );/**
+ * Handles parsing, caching, and detecting changes to border CSS
+ * @constructor
+ * @param {Element} el the target element
+ */
+PIE.BorderStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
+
+    sides: [ 'Top', 'Right', 'Bottom', 'Left' ],
+    namedWidths: {
+        'thin': '1px',
+        'medium': '3px',
+        'thick': '5px'
+    },
+
+    parseCss: function( css ) {
+        var w = {},
+            s = {},
+            c = {},
+            active = false,
+            colorsSame = true,
+            stylesSame = true,
+            widthsSame = true;
+
+        this.withActualBorder( function() {
+            var el = this.targetElement,
+                cs = el.currentStyle,
+                i = 0,
+                style, color, width, lastStyle, lastColor, lastWidth, side, ltr;
+            for( ; i < 4; i++ ) {
+                side = this.sides[ i ];
+
+                ltr = side.charAt(0).toLowerCase();
+                style = s[ ltr ] = cs[ 'border' + side + 'Style' ];
+                color = cs[ 'border' + side + 'Color' ];
+                width = cs[ 'border' + side + 'Width' ];
+
+                if( i > 0 ) {
+                    if( style !== lastStyle ) { stylesSame = false; }
+                    if( color !== lastColor ) { colorsSame = false; }
+                    if( width !== lastWidth ) { widthsSame = false; }
+                }
+                lastStyle = style;
+                lastColor = color;
+                lastWidth = width;
+
+                c[ ltr ] = PIE.getColor( color );
+
+                width = w[ ltr ] = PIE.getLength( s[ ltr ] === 'none' ? '0' : ( this.namedWidths[ width ] || width ) );
+                if( width.pixels( this.targetElement ) > 0 ) {
+                    active = true;
+                }
+            }
+        } );
+
+        return active ? {
+            widths: w,
+            styles: s,
+            colors: c,
+            widthsSame: widthsSame,
+            colorsSame: colorsSame,
+            stylesSame: stylesSame
+        } : null;
+    },
+
+    getCss: PIE.StyleInfoBase.cacheWhenLocked( function() {
+        var el = this.targetElement,
+            cs = el.currentStyle,
+            css;
+
+        // Don't redraw or hide borders for cells in border-collapse:collapse tables
+        if( !( el.tagName in PIE.tableCellTags && el.offsetParent.currentStyle.borderCollapse === 'collapse' ) ) {
+            this.withActualBorder( function() {
+                css = cs.borderWidth + '|' + cs.borderStyle + '|' + cs.borderColor;
+            } );
+        }
+        return css;
+    } ),
+
+    /**
+     * Execute a function with the actual border styles (not overridden with runtimeStyle
+     * properties set by the renderers) available via currentStyle.
+     * @param fn
+     */
+    withActualBorder: function( fn ) {
+        var rs = this.targetElement.runtimeStyle,
+            rsWidth = rs.borderWidth,
+            rsColor = rs.borderColor,
+            ret;
+
+        if( rsWidth ) rs.borderWidth = '';
+        if( rsColor ) rs.borderColor = '';
+
+        ret = fn.call( this );
+
+        if( rsWidth ) rs.borderWidth = rsWidth;
+        if( rsColor ) rs.borderColor = rsColor;
+
+        return ret;
+    }
+
+} );
+/**
+ * Handles parsing, caching, and detecting changes to border-radius CSS
+ * @constructor
+ * @param {Element} el the target element
+ */
+(function() {
+
+PIE.BorderRadiusStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
+
+    cssProperty: 'border-radius',
+    styleProperty: 'borderRadius',
+
+    parseCss: function( css ) {
+        var p = null, x, y,
+            tokenizer, token, length,
+            hasNonZero = false;
+
+        if( css ) {
+            tokenizer = new PIE.Tokenizer( css );
+
+            function collectLengths() {
+                var arr = [], num;
+                while( ( token = tokenizer.next() ) && token.isLengthOrPercent() ) {
+                    length = PIE.getLength( token.tokenValue );
+                    num = length.getNumber();
+                    if( num < 0 ) {
+                        return null;
+                    }
+                    if( num > 0 ) {
+                        hasNonZero = true;
+                    }
+                    arr.push( length );
+                }
+                return arr.length > 0 && arr.length < 5 ? {
+                        'tl': arr[0],
+                        'tr': arr[1] || arr[0],
+                        'br': arr[2] || arr[0],
+                        'bl': arr[3] || arr[1] || arr[0]
+                    } : null;
+            }
+
+            // Grab the initial sequence of lengths
+            if( x = collectLengths() ) {
+                // See if there is a slash followed by more lengths, for the y-axis radii
+                if( token ) {
+                    if( token.tokenType & PIE.Tokenizer.Type.OPERATOR && token.tokenValue === '/' ) {
+                        y = collectLengths();
+                    }
+                } else {
+                    y = x;
+                }
+
+                // Treat all-zero values the same as no value
+                if( hasNonZero && x && y ) {
+                    p = { x: x, y : y };
+                }
+            }
+        }
+
+        return p;
+    }
+} );
+
+var zero = PIE.getLength( '0' ),
+    zeros = { 'tl': zero, 'tr': zero, 'br': zero, 'bl': zero };
+PIE.BorderRadiusStyleInfo.ALL_ZERO = { x: zeros, y: zeros };
+
+})();/**
+ * Handles parsing, caching, and detecting changes to border-image CSS
+ * @constructor
+ * @param {Element} el the target element
+ */
+PIE.BorderImageStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
+
+    cssProperty: 'border-image',
+    styleProperty: 'borderImage',
+
+    repeatIdents: { 'stretch':1, 'round':1, 'repeat':1, 'space':1 },
+
+    parseCss: function( css ) {
+        var p = null, tokenizer, token, type, value,
+            slices, widths, outsets,
+            slashCount = 0,
+            Type = PIE.Tokenizer.Type,
+            IDENT = Type.IDENT,
+            NUMBER = Type.NUMBER,
+            PERCENT = Type.PERCENT;
+
+        if( css ) {
+            tokenizer = new PIE.Tokenizer( css );
+            p = {};
+
+            function isSlash( token ) {
+                return token && ( token.tokenType & Type.OPERATOR ) && ( token.tokenValue === '/' );
+            }
+
+            function isFillIdent( token ) {
+                return token && ( token.tokenType & IDENT ) && ( token.tokenValue === 'fill' );
+            }
+
+            function collectSlicesEtc() {
+                slices = tokenizer.until( function( tok ) {
+                    return !( tok.tokenType & ( NUMBER | PERCENT ) );
+                } );
+
+                if( isFillIdent( tokenizer.next() ) && !p.fill ) {
+                    p.fill = true;
+                } else {
+                    tokenizer.prev();
+                }
+
+                if( isSlash( tokenizer.next() ) ) {
+                    slashCount++;
+                    widths = tokenizer.until( function( token ) {
+                        return !token.isLengthOrPercent() && !( ( token.tokenType & IDENT ) && token.tokenValue === 'auto' );
+                    } );
+
+                    if( isSlash( tokenizer.next() ) ) {
+                        slashCount++;
+                        outsets = tokenizer.until( function( token ) {
+                            return !token.isLength();
+                        } );
+                    }
+                } else {
+                    tokenizer.prev();
+                }
+            }
+
+            while( token = tokenizer.next() ) {
+                type = token.tokenType;
+                value = token.tokenValue;
+
+                // Numbers and/or 'fill' keyword: slice values. May be followed optionally by width values, followed optionally by outset values
+                if( type & ( NUMBER | PERCENT ) && !slices ) {
+                    tokenizer.prev();
+                    collectSlicesEtc();
+                }
+                else if( isFillIdent( token ) && !p.fill ) {
+                    p.fill = true;
+                    collectSlicesEtc();
+                }
+
+                // Idents: one or values for 'repeat'
+                else if( ( type & IDENT ) && this.repeatIdents[value] && !p.repeat ) {
+                    p.repeat = { h: value };
+                    if( token = tokenizer.next() ) {
+                        if( ( token.tokenType & IDENT ) && this.repeatIdents[token.tokenValue] ) {
+                            p.repeat.v = token.tokenValue;
+                        } else {
+                            tokenizer.prev();
+                        }
+                    }
+                }
+
+                // URL of the image
+                else if( ( type & Type.URL ) && !p.src ) {
+                    p.src =  value;
+                }
+
+                // Found something unrecognized; exit.
+                else {
+                    return null;
+                }
+            }
+
+            // Validate what we collected
+            if( !p.src || !slices || slices.length < 1 || slices.length > 4 ||
+                ( widths && widths.length > 4 ) || ( slashCount === 1 && widths.length < 1 ) ||
+                ( outsets && outsets.length > 4 ) || ( slashCount === 2 && outsets.length < 1 ) ) {
+                return null;
+            }
+
+            // Fill in missing values
+            if( !p.repeat ) {
+                p.repeat = { h: 'stretch' };
+            }
+            if( !p.repeat.v ) {
+                p.repeat.v = p.repeat.h;
+            }
+
+            function distributeSides( tokens, convertFn ) {
+                return {
+                    't': convertFn( tokens[0] ),
+                    'r': convertFn( tokens[1] || tokens[0] ),
+                    'b': convertFn( tokens[2] || tokens[0] ),
+                    'l': convertFn( tokens[3] || tokens[1] || tokens[0] )
+                };
+            }
+
+            p.slice = distributeSides( slices, function( tok ) {
+                return PIE.getLength( ( tok.tokenType & NUMBER ) ? tok.tokenValue + 'px' : tok.tokenValue );
+            } );
+
+            if( widths && widths[0] ) {
+                p.widths = distributeSides( widths, function( tok ) {
+                    return tok.isLengthOrPercent() ? PIE.getLength( tok.tokenValue ) : tok.tokenValue;
+                } );
+            }
+
+            if( outsets && outsets[0] ) {
+                p.outset = distributeSides( outsets, function( tok ) {
+                    return tok.isLength() ? PIE.getLength( tok.tokenValue ) : tok.tokenValue;
+                } );
+            }
+        }
+
+        return p;
+    }
+
+} );/**
+ * Handles parsing, caching, and detecting changes to box-shadow CSS
+ * @constructor
+ * @param {Element} el the target element
+ */
+PIE.BoxShadowStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
+
+    cssProperty: 'box-shadow',
+    styleProperty: 'boxShadow',
+
+    parseCss: function( css ) {
+        var props,
+            getLength = PIE.getLength,
+            Type = PIE.Tokenizer.Type,
+            tokenizer;
+
+        if( css ) {
+            tokenizer = new PIE.Tokenizer( css );
+            props = { outset: [], inset: [] };
+
+            function parseItem() {
+                var token, type, value, color, lengths, inset, len;
+
+                while( token = tokenizer.next() ) {
+                    value = token.tokenValue;
+                    type = token.tokenType;
+
+                    if( type & Type.OPERATOR && value === ',' ) {
+                        break;
+                    }
+                    else if( token.isLength() && !lengths ) {
+                        tokenizer.prev();
+                        lengths = tokenizer.until( function( token ) {
+                            return !token.isLength();
+                        } );
+                    }
+                    else if( type & Type.COLOR && !color ) {
+                        color = value;
+                    }
+                    else if( type & Type.IDENT && value === 'inset' && !inset ) {
+                        inset = true;
+                    }
+                    else { //encountered an unrecognized token; fail.
+                        return false;
+                    }
+                }
+
+                len = lengths && lengths.length;
+                if( len > 1 && len < 5 ) {
+                    ( inset ? props.inset : props.outset ).push( {
+                        xOffset: getLength( lengths[0].tokenValue ),
+                        yOffset: getLength( lengths[1].tokenValue ),
+                        blur: getLength( lengths[2] ? lengths[2].tokenValue : '0' ),
+                        spread: getLength( lengths[3] ? lengths[3].tokenValue : '0' ),
+                        color: PIE.getColor( color || 'currentColor' )
+                    } );
+                    return true;
+                }
+                return false;
+            }
+
+            while( parseItem() ) {}
+        }
+
+        return props && ( props.inset.length || props.outset.length ) ? props : null;
+    }
+} );
+/**
+ * Retrieves the state of the element's visibility and display
+ * @constructor
+ * @param {Element} el the target element
+ */
+PIE.VisibilityStyleInfo = PIE.StyleInfoBase.newStyleInfo( {
+
+    getCss: PIE.StyleInfoBase.cacheWhenLocked( function() {
+        var cs = this.targetElement.currentStyle;
+        return cs.visibility + '|' + cs.display;
+    } ),
+
+    parseCss: function() {
+        var el = this.targetElement,
+            rs = el.runtimeStyle,
+            cs = el.currentStyle,
+            rsVis = rs.visibility,
+            csVis;
+
+        rs.visibility = '';
+        csVis = cs.visibility;
+        rs.visibility = rsVis;
+
+        return {
+            visible: csVis !== 'hidden',
+            displayed: cs.display !== 'none'
+        }
+    },
+
+    /**
+     * Always return false for isActive, since this property alone will not trigger
+     * a renderer to do anything.
+     */
+    isActive: function() {
+        return false;
+    }
+
+} );
+PIE.RendererBase = {
+
+    /**
+     * Create a new Renderer class, with the standard constructor, and augmented by
+     * the RendererBase's members.
+     * @param proto
+     */
+    newRenderer: function( proto ) {
+        function Renderer( el, boundsInfo, styleInfos, parent ) {
+            this.targetElement = el;
+            this.boundsInfo = boundsInfo;
+            this.styleInfos = styleInfos;
+            this.parent = parent;
+        }
+        PIE.Util.merge( Renderer.prototype, PIE.RendererBase, proto );
+        return Renderer;
+    },
+
+    /**
+     * Flag indicating the element has already been positioned at least once.
+     * @type {boolean}
+     */
+    isPositioned: false,
+
+    /**
+     * Determine if the renderer needs to be updated
+     * @return {boolean}
+     */
+    needsUpdate: function() {
+        return false;
+    },
+
+    /**
+     * Run any preparation logic that would affect the main update logic of this
+     * renderer or any of the other renderers, e.g. things that might affect the
+     * element's size or style properties.
+     */
+    prepareUpdate: PIE.emptyFn,
+
+    /**
+     * Tell the renderer to update based on modified properties
+     */
+    updateProps: function() {
+        this.destroy();
+        if( this.isActive() ) {
+            this.draw();
+        }
+    },
+
+    /**
+     * Tell the renderer to update based on modified element position
+     */
+    updatePos: function() {
+        this.isPositioned = true;
+    },
+
+    /**
+     * Tell the renderer to update based on modified element dimensions
+     */
+    updateSize: function() {
+        if( this.isActive() ) {
+            this.draw();
+        } else {
+            this.destroy();
+        }
+    },
+
+
+    /**
+     * Add a layer element, with the given z-order index, to the renderer's main box element. We can't use
+     * z-index because that breaks when the root rendering box's z-index is 'auto' in IE8+ standards mode.
+     * So instead we make sure they are inserted into the DOM in the correct order.
+     * @param {number} index
+     * @param {Element} el
+     */
+    addLayer: function( index, el ) {
+        this.removeLayer( index );
+        for( var layers = this._layers || ( this._layers = [] ), i = index + 1, len = layers.length, layer; i < len; i++ ) {
+            layer = layers[i];
+            if( layer ) {
+                break;
+            }
+        }
+        layers[index] = el;
+        this.getBox().insertBefore( el, layer || null );
+    },
+
+    /**
+     * Retrieve a layer element by its index, or null if not present
+     * @param {number} index
+     * @return {Element}
+     */
+    getLayer: function( index ) {
+        var layers = this._layers;
+        return layers && layers[index] || null;
+    },
+
+    /**
+     * Remove a layer element by its index
+     * @param {number} index
+     */
+    removeLayer: function( index ) {
+        var layer = this.getLayer( index ),
+            box = this._box;
+        if( layer && box ) {
+            box.removeChild( layer );
+            this._layers[index] = null;
+        }
+    },
+
+
+    /**
+     * Get a VML shape by name, creating it if necessary.
+     * @param {string} name A name identifying the element
+     * @param {string=} subElName If specified a subelement of the shape will be created with this tag name
+     * @param {Element} parent The parent element for the shape; will be ignored if 'group' is specified
+     * @param {number=} group If specified, an ordinal group for the shape. 1 or greater. Groups are rendered
+     *                  using container elements in the correct order, to get correct z stacking without z-index.
+     */
+    getShape: function( name, subElName, parent, group ) {
+        var shapes = this._shapes || ( this._shapes = {} ),
+            shape = shapes[ name ],
+            s;
+
+        if( !shape ) {
+            shape = shapes[ name ] = PIE.Util.createVmlElement( 'shape' );
+            if( subElName ) {
+                shape.appendChild( shape[ subElName ] = PIE.Util.createVmlElement( subElName ) );
+            }
+
+            if( group ) {
+                parent = this.getLayer( group );
+                if( !parent ) {
+                    this.addLayer( group, doc.createElement( 'group' + group ) );
+                    parent = this.getLayer( group );
+                }
+            }
+
+            parent.appendChild( shape );
+
+            s = shape.style;
+            s.position = 'absolute';
+            s.left = s.top = 0;
+            s['behavior'] = 'url(#default#VML)';
+        }
+        return shape;
+    },
+
+    /**
+     * Delete a named shape which was created by getShape(). Returns true if a shape with the
+     * given name was found and deleted, or false if there was no shape of that name.
+     * @param {string} name
+     * @return {boolean}
+     */
+    deleteShape: function( name ) {
+        var shapes = this._shapes,
+            shape = shapes && shapes[ name ];
+        if( shape ) {
+            shape.parentNode.removeChild( shape );
+            delete shapes[ name ];
+        }
+        return !!shape;
+    },
+
+
+    /**
+     * For a given set of border radius length/percentage values, convert them to concrete pixel
+     * values based on the current size of the target element.
+     * @param {Object} radii
+     * @return {Object}
+     */
+    getRadiiPixels: function( radii ) {
+        var el = this.targetElement,
+            bounds = this.boundsInfo.getBounds(),
+            w = bounds.w,
+            h = bounds.h,
+            tlX, tlY, trX, trY, brX, brY, blX, blY, f;
+
+        tlX = radii.x['tl'].pixels( el, w );
+        tlY = radii.y['tl'].pixels( el, h );
+        trX = radii.x['tr'].pixels( el, w );
+        trY = radii.y['tr'].pixels( el, h );
+        brX = radii.x['br'].pixels( el, w );
+        brY = radii.y['br'].pixels( el, h );
+        blX = radii.x['bl'].pixels( el, w );
+        blY = radii.y['bl'].pixels( el, h );
+
+        // If any corner ellipses overlap, reduce them all by the appropriate factor. This formula
+        // is taken straight from the CSS3 Backgrounds and Borders spec.
+        f = Math.min(
+            w / ( tlX + trX ),
+            h / ( trY + brY ),
+            w / ( blX + brX ),
+            h / ( tlY + blY )
+        );
+        if( f < 1 ) {
+            tlX *= f;
+            tlY *= f;
+            trX *= f;
+            trY *= f;
+            brX *= f;
+            brY *= f;
+            blX *= f;
+            blY *= f;
+        }
+
+        return {
+            x: {
+                'tl': tlX,
+                'tr': trX,
+                'br': brX,
+                'bl': blX
+            },
+            y: {
+                'tl': tlY,
+                'tr': trY,
+                'br': brY,
+                'bl': blY
+            }
+        }
+    },
+
+    /**
+     * Return the VML path string for the element's background box, with corners rounded.
+     * @param {Object.<{t:number, r:number, b:number, l:number}>} shrink - if present, specifies number of
+     *        pixels to shrink the box path inward from the element's four sides.
+     * @param {number=} mult If specified, all coordinates will be multiplied by this number
+     * @param {Object=} radii If specified, this will be used for the corner radii instead of the properties
+     *        from this renderer's borderRadiusInfo object.
+     * @return {string} the VML path
+     */
+    getBoxPath: function( shrink, mult, radii ) {
+        mult = mult || 1;
+
+        var r, str,
+            bounds = this.boundsInfo.getBounds(),
+            w = bounds.w * mult,
+            h = bounds.h * mult,
+            radInfo = this.styleInfos.borderRadiusInfo,
+            floor = Math.floor, ceil = Math.ceil,
+            shrinkT = shrink ? shrink.t * mult : 0,
+            shrinkR = shrink ? shrink.r * mult : 0,
+            shrinkB = shrink ? shrink.b * mult : 0,
+            shrinkL = shrink ? shrink.l * mult : 0,
+            tlX, tlY, trX, trY, brX, brY, blX, blY;
+
+        if( radii || radInfo.isActive() ) {
+            r = this.getRadiiPixels( radii || radInfo.getProps() );
+
+            tlX = r.x['tl'] * mult;
+            tlY = r.y['tl'] * mult;
+            trX = r.x['tr'] * mult;
+            trY = r.y['tr'] * mult;
+            brX = r.x['br'] * mult;
+            brY = r.y['br'] * mult;
+            blX = r.x['bl'] * mult;
+            blY = r.y['bl'] * mult;
+
+            str = 'm' + floor( shrinkL ) + ',' + floor( tlY ) +
+                'qy' + floor( tlX ) + ',' + floor( shrinkT ) +
+                'l' + ceil( w - trX ) + ',' + floor( shrinkT ) +
+                'qx' + ceil( w - shrinkR ) + ',' + floor( trY ) +
+                'l' + ceil( w - shrinkR ) + ',' + ceil( h - brY ) +
+                'qy' + ceil( w - brX ) + ',' + ceil( h - shrinkB ) +
+                'l' + floor( blX ) + ',' + ceil( h - shrinkB ) +
+                'qx' + floor( shrinkL ) + ',' + ceil( h - blY ) + ' x e';
+        } else {
+            // simplified path for non-rounded box
+            str = 'm' + floor( shrinkL ) + ',' + floor( shrinkT ) +
+                  'l' + ceil( w - shrinkR ) + ',' + floor( shrinkT ) +
+                  'l' + ceil( w - shrinkR ) + ',' + ceil( h - shrinkB ) +
+                  'l' + floor( shrinkL ) + ',' + ceil( h - shrinkB ) +
+                  'xe';
+        }
+        return str;
+    },
+
+
+    /**
+     * Get the container element for the shapes, creating it if necessary.
+     */
+    getBox: function() {
+        var box = this.parent.getLayer( this.boxZIndex ), s;
+
+        if( !box ) {
+            box = doc.createElement( this.boxName );
+            s = box.style;
+            s.position = 'absolute';
+            s.top = s.left = 0;
+            this.parent.addLayer( this.boxZIndex, box );
+        }
+
+        return box;
+    },
+
+
+    /**
+     * Hide the actual border of the element. In IE7 and up we can just set its color to transparent;
+     * however IE6 does not support transparent borders so we have to get tricky with it. Also, some elements
+     * like form buttons require removing the border width altogether, so for those we increase the padding
+     * by the border size.
+     */
+    hideBorder: function() {
+        var el = this.targetElement,
+            cs = el.currentStyle,
+            rs = el.runtimeStyle,
+            tag = el.tagName,
+            isIE6 = PIE.ieVersion === 6,
+            sides, side, i;
+
+        if( ( isIE6 && ( tag in PIE.childlessElements || tag === 'FIELDSET' ) ) ||
+                tag === 'BUTTON' || ( tag === 'INPUT' && el.type in PIE.inputButtonTypes ) ) {
+            rs.borderWidth = '';
+            sides = this.styleInfos.borderInfo.sides;
+            for( i = sides.length; i--; ) {
+                side = sides[ i ];
+                rs[ 'padding' + side ] = '';
+                rs[ 'padding' + side ] = ( PIE.getLength( cs[ 'padding' + side ] ) ).pixels( el ) +
+                                         ( PIE.getLength( cs[ 'border' + side + 'Width' ] ) ).pixels( el ) +
+                                         ( PIE.ieVersion !== 8 && i % 2 ? 1 : 0 ); //needs an extra horizontal pixel to counteract the extra "inner border" going away
+            }
+            rs.borderWidth = 0;
+        }
+        else if( isIE6 ) {
+            // Wrap all the element's children in a custom element, set the element to visiblity:hidden,
+            // and set the wrapper element to visiblity:visible. This hides the outer element's decorations
+            // (background and border) but displays all the contents.
+            // TODO find a better way to do this that doesn't mess up the DOM parent-child relationship,
+            // as this can interfere with other author scripts which add/modify/delete children. Also, this
+            // won't work for elements which cannot take children, e.g. input/button/textarea/img/etc. Look into
+            // using a compositor filter or some other filter which masks the border.
+            if( el.childNodes.length !== 1 || el.firstChild.tagName !== 'ie6-mask' ) {
+                var cont = doc.createElement( 'ie6-mask' ),
+                    s = cont.style, child;
+                s.visibility = 'visible';
+                s.zoom = 1;
+                while( child = el.firstChild ) {
+                    cont.appendChild( child );
+                }
+                el.appendChild( cont );
+                rs.visibility = 'hidden';
+            }
+        }
+        else {
+            rs.borderColor = 'transparent';
+        }
+    },
+
+    unhideBorder: function() {
+        
+    },
+
+
+    /**
+     * Destroy the rendered objects. This is a base implementation which handles common renderer
+     * structures, but individual renderers may override as necessary.
+     */
+    destroy: function() {
+        this.parent.removeLayer( this.boxZIndex );
+        delete this._shapes;
+        delete this._layers;
+    }
+};
+/**
+ * Root renderer; creates the outermost container element and handles keeping it aligned
+ * with the target element's size and position.
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ */
+PIE.RootRenderer = PIE.RendererBase.newRenderer( {
+
+    isActive: function() {
+        var children = this.childRenderers;
+        for( var i in children ) {
+            if( children.hasOwnProperty( i ) && children[ i ].isActive() ) {
+                return true;
+            }
+        }
+        return false;
+    },
+
+    needsUpdate: function() {
+        return this.styleInfos.visibilityInfo.changed();
+    },
+
+    updatePos: function() {
+        if( this.isActive() ) {
+            var el = this.getPositioningElement(),
+                par = el,
+                docEl,
+                parRect,
+                tgtCS = el.currentStyle,
+                tgtPos = tgtCS.position,
+                boxPos,
+                s = this.getBox().style, cs,
+                x = 0, y = 0,
+                elBounds = this.boundsInfo.getBounds(),
+                logicalZoomRatio = elBounds.logicalZoomRatio;
+
+            if( tgtPos === 'fixed' && PIE.ieVersion > 6 ) {
+                x = elBounds.x * logicalZoomRatio;
+                y = elBounds.y * logicalZoomRatio;
+                boxPos = tgtPos;
+            } else {
+                // Get the element's offsets from its nearest positioned ancestor. Uses
+                // getBoundingClientRect for accuracy and speed.
+                do {
+                    par = par.offsetParent;
+                } while( par && ( par.currentStyle.position === 'static' ) );
+                if( par ) {
+                    parRect = par.getBoundingClientRect();
+                    cs = par.currentStyle;
+                    x = ( elBounds.x - parRect.left ) * logicalZoomRatio - ( parseFloat(cs.borderLeftWidth) || 0 );
+                    y = ( elBounds.y - parRect.top ) * logicalZoomRatio - ( parseFloat(cs.borderTopWidth) || 0 );
+                } else {
+                    docEl = doc.documentElement;
+                    x = ( elBounds.x + docEl.scrollLeft - docEl.clientLeft ) * logicalZoomRatio;
+                    y = ( elBounds.y + docEl.scrollTop - docEl.clientTop ) * logicalZoomRatio;
+                }
+                boxPos = 'absolute';
+            }
+
+            s.position = boxPos;
+            s.left = x;
+            s.top = y;
+            s.zIndex = tgtPos === 'static' ? -1 : tgtCS.zIndex;
+            this.isPositioned = true;
+        }
+    },
+
+    updateSize: PIE.emptyFn,
+
+    updateVisibility: function() {
+        var vis = this.styleInfos.visibilityInfo.getProps();
+        this.getBox().style.display = ( vis.visible && vis.displayed ) ? '' : 'none';
+    },
+
+    updateProps: function() {
+        if( this.isActive() ) {
+            this.updateVisibility();
+        } else {
+            this.destroy();
+        }
+    },
+
+    getPositioningElement: function() {
+        var el = this.targetElement;
+        return el.tagName in PIE.tableCellTags ? el.offsetParent : el;
+    },
+
+    getBox: function() {
+        var box = this._box, el;
+        if( !box ) {
+            el = this.getPositioningElement();
+            box = this._box = doc.createElement( 'css3-container' );
+            box.style['direction'] = 'ltr'; //fix positioning bug in rtl environments
+
+            this.updateVisibility();
+
+            el.parentNode.insertBefore( box, el );
+        }
+        return box;
+    },
+
+    finishUpdate: PIE.emptyFn,
+
+    destroy: function() {
+        var box = this._box, par;
+        if( box && ( par = box.parentNode ) ) {
+            par.removeChild( box );
+        }
+        delete this._box;
+        delete this._layers;
+    }
+
+} );
+/**
+ * Renderer for element backgrounds.
+ * @constructor
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ * @param {PIE.RootRenderer} parent
+ */
+PIE.BackgroundRenderer = PIE.RendererBase.newRenderer( {
+
+    boxZIndex: 2,
+    boxName: 'background',
+
+    needsUpdate: function() {
+        var si = this.styleInfos;
+        return si.backgroundInfo.changed() || si.borderRadiusInfo.changed();
+    },
+
+    isActive: function() {
+        var si = this.styleInfos;
+        return si.borderImageInfo.isActive() ||
+               si.borderRadiusInfo.isActive() ||
+               si.backgroundInfo.isActive() ||
+               ( si.boxShadowInfo.isActive() && si.boxShadowInfo.getProps().inset );
+    },
+
+    /**
+     * Draw the shapes
+     */
+    draw: function() {
+        var bounds = this.boundsInfo.getBounds();
+        if( bounds.w && bounds.h ) {
+            this.drawBgColor();
+            this.drawBgImages();
+        }
+    },
+
+    /**
+     * Draw the background color shape
+     */
+    drawBgColor: function() {
+        var props = this.styleInfos.backgroundInfo.getProps(),
+            bounds = this.boundsInfo.getBounds(),
+            el = this.targetElement,
+            color = props && props.color,
+            shape, w, h, s, alpha;
+
+        if( color && color.alpha() > 0 ) {
+            this.hideBackground();
+
+            shape = this.getShape( 'bgColor', 'fill', this.getBox(), 1 );
+            w = bounds.w;
+            h = bounds.h;
+            shape.stroked = false;
+            shape.coordsize = w * 2 + ',' + h * 2;
+            shape.coordorigin = '1,1';
+            shape.path = this.getBoxPath( null, 2 );
+            s = shape.style;
+            s.width = w;
+            s.height = h;
+            shape.fill.color = color.colorValue( el );
+
+            alpha = color.alpha();
+            if( alpha < 1 ) {
+                shape.fill.opacity = alpha;
+            }
+        } else {
+            this.deleteShape( 'bgColor' );
+        }
+    },
+
+    /**
+     * Draw all the background image layers
+     */
+    drawBgImages: function() {
+        var props = this.styleInfos.backgroundInfo.getProps(),
+            bounds = this.boundsInfo.getBounds(),
+            images = props && props.bgImages,
+            img, shape, w, h, s, i;
+
+        if( images ) {
+            this.hideBackground();
+
+            w = bounds.w;
+            h = bounds.h;
+
+            i = images.length;
+            while( i-- ) {
+                img = images[i];
+                shape = this.getShape( 'bgImage' + i, 'fill', this.getBox(), 2 );
+
+                shape.stroked = false;
+                shape.fill.type = 'tile';
+                shape.fillcolor = 'none';
+                shape.coordsize = w * 2 + ',' + h * 2;
+                shape.coordorigin = '1,1';
+                shape.path = this.getBoxPath( 0, 2 );
+                s = shape.style;
+                s.width = w;
+                s.height = h;
+
+                if( img.imgType === 'linear-gradient' ) {
+                    this.addLinearGradient( shape, img );
+                }
+                else {
+                    shape.fill.src = img.imgUrl;
+                    this.positionBgImage( shape, i );
+                }
+            }
+        }
+
+        // Delete any bgImage shapes previously created which weren't used above
+        i = images ? images.length : 0;
+        while( this.deleteShape( 'bgImage' + i++ ) ) {}
+    },
+
+
+    /**
+     * Set the position and clipping of the background image for a layer
+     * @param {Element} shape
+     * @param {number} index
+     */
+    positionBgImage: function( shape, index ) {
+        var me = this;
+        PIE.Util.withImageSize( shape.fill.src, function( size ) {
+            var el = me.targetElement,
+                bounds = me.boundsInfo.getBounds(),
+                elW = bounds.w,
+                elH = bounds.h;
+
+            // It's possible that the element dimensions are zero now but weren't when the original
+            // update executed, make sure that's not the case to avoid divide-by-zero error
+            if( elW && elH ) {
+                var fill = shape.fill,
+                    si = me.styleInfos,
+                    border = si.borderInfo.getProps(),
+                    bw = border && border.widths,
+                    bwT = bw ? bw['t'].pixels( el ) : 0,
+                    bwR = bw ? bw['r'].pixels( el ) : 0,
+                    bwB = bw ? bw['b'].pixels( el ) : 0,
+                    bwL = bw ? bw['l'].pixels( el ) : 0,
+                    bg = si.backgroundInfo.getProps().bgImages[ index ],
+                    bgPos = bg.bgPosition ? bg.bgPosition.coords( el, elW - size.w - bwL - bwR, elH - size.h - bwT - bwB ) : { x:0, y:0 },
+                    repeat = bg.imgRepeat,
+                    pxX, pxY,
+                    clipT = 0, clipL = 0,
+                    clipR = elW + 1, clipB = elH + 1, //make sure the default clip region is not inside the box (by a subpixel)
+                    clipAdjust = PIE.ieVersion === 8 ? 0 : 1; //prior to IE8 requires 1 extra pixel in the image clip region
+
+                // Positioning - find the pixel offset from the top/left and convert to a ratio
+                // The position is shifted by half a pixel, to adjust for the half-pixel coordorigin shift which is
+                // needed to fix antialiasing but makes the bg image fuzzy.
+                pxX = Math.round( bgPos.x ) + bwL + 0.5;
+                pxY = Math.round( bgPos.y ) + bwT + 0.5;
+                fill.position = ( pxX / elW ) + ',' + ( pxY / elH );
+
+                // Set the size of the image. We have to actually set it to px values otherwise it will not honor
+                // the user's browser zoom level and always display at its natural screen size.
+                fill['size']['x'] = 1; //Can be any value, just has to be set to "prime" it so the next line works. Weird!
+                fill['size'] = size.w + 'px,' + size.h + 'px';
+
+                // Repeating - clip the image shape
+                if( repeat && repeat !== 'repeat' ) {
+                    if( repeat === 'repeat-x' || repeat === 'no-repeat' ) {
+                        clipT = pxY + 1;
+                        clipB = pxY + size.h + clipAdjust;
+                    }
+                    if( repeat === 'repeat-y' || repeat === 'no-repeat' ) {
+                        clipL = pxX + 1;
+                        clipR = pxX + size.w + clipAdjust;
+                    }
+                    shape.style.clip = 'rect(' + clipT + 'px,' + clipR + 'px,' + clipB + 'px,' + clipL + 'px)';
+                }
+            }
+        } );
+    },
+
+
+    /**
+     * Draw the linear gradient for a gradient layer
+     * @param {Element} shape
+     * @param {Object} info The object holding the information about the gradient
+     */
+    addLinearGradient: function( shape, info ) {
+        var el = this.targetElement,
+            bounds = this.boundsInfo.getBounds(),
+            w = bounds.w,
+            h = bounds.h,
+            fill = shape.fill,
+            stops = info.stops,
+            stopCount = stops.length,
+            PI = Math.PI,
+            GradientUtil = PIE.GradientUtil,
+            perpendicularIntersect = GradientUtil.perpendicularIntersect,
+            distance = GradientUtil.distance,
+            metrics = GradientUtil.getGradientMetrics( el, w, h, info ),
+            angle = metrics.angle,
+            startX = metrics.startX,
+            startY = metrics.startY,
+            startCornerX = metrics.startCornerX,
+            startCornerY = metrics.startCornerY,
+            endCornerX = metrics.endCornerX,
+            endCornerY = metrics.endCornerY,
+            deltaX = metrics.deltaX,
+            deltaY = metrics.deltaY,
+            lineLength = metrics.lineLength,
+            vmlAngle, vmlGradientLength, vmlColors,
+            stopPx, vmlOffsetPct,
+            p, i, j, before, after;
+
+        // In VML land, the angle of the rendered gradient depends on the aspect ratio of the shape's
+        // bounding box; for example specifying a 45 deg angle actually results in a gradient
+        // drawn diagonally from one corner to its opposite corner, which will only appear to the
+        // viewer as 45 degrees if the shape is equilateral.  We adjust for this by taking the x/y deltas
+        // between the start and end points, multiply one of them by the shape's aspect ratio,
+        // and get their arctangent, resulting in an appropriate VML angle. If the angle is perfectly
+        // horizontal or vertical then we don't need to do this conversion.
+        vmlAngle = ( angle % 90 ) ? Math.atan2( deltaX * w / h, deltaY ) / PI * 180 : ( angle + 90 );
+
+        // VML angles are 180 degrees offset from CSS angles
+        vmlAngle += 180;
+        vmlAngle = vmlAngle % 360;
+
+        // Add all the stops to the VML 'colors' list, including the first and last stops.
+        // For each, we find its pixel offset along the gradient-line; if the offset of a stop is less
+        // than that of its predecessor we increase it to be equal. We then map that pixel offset to a
+        // percentage along the VML gradient-line, which runs from shape corner to corner.
+        p = perpendicularIntersect( startCornerX, startCornerY, angle, endCornerX, endCornerY );
+        vmlGradientLength = distance( startCornerX, startCornerY, p[0], p[1] );
+        vmlColors = [];
+        p = perpendicularIntersect( startX, startY, angle, startCornerX, startCornerY );
+        vmlOffsetPct = distance( startX, startY, p[0], p[1] ) / vmlGradientLength * 100;
+
+        // Find the pixel offsets along the CSS3 gradient-line for each stop.
+        stopPx = [];
+        for( i = 0; i < stopCount; i++ ) {
+            stopPx.push( stops[i].offset ? stops[i].offset.pixels( el, lineLength ) :
+                         i === 0 ? 0 : i === stopCount - 1 ? lineLength : null );
+        }
+        // Fill in gaps with evenly-spaced offsets
+        for( i = 1; i < stopCount; i++ ) {
+            if( stopPx[ i ] === null ) {
+                before = stopPx[ i - 1 ];
+                j = i;
+                do {
+                    after = stopPx[ ++j ];
+                } while( after === null );
+                stopPx[ i ] = before + ( after - before ) / ( j - i + 1 );
+            }
+            // Make sure each stop's offset is no less than the one before it
+            stopPx[ i ] = Math.max( stopPx[ i ], stopPx[ i - 1 ] );
+        }
+
+        // Convert to percentage along the VML gradient line and add to the VML 'colors' value
+        for( i = 0; i < stopCount; i++ ) {
+            vmlColors.push(
+                ( vmlOffsetPct + ( stopPx[ i ] / vmlGradientLength * 100 ) ) + '% ' + stops[i].color.colorValue( el )
+            );
+        }
+
+        // Now, finally, we're ready to render the gradient fill. Set the start and end colors to
+        // the first and last stop colors; this just sets outer bounds for the gradient.
+        fill['angle'] = vmlAngle;
+        fill['type'] = 'gradient';
+        fill['method'] = 'sigma';
+        fill['color'] = stops[0].color.colorValue( el );
+        fill['color2'] = stops[stopCount - 1].color.colorValue( el );
+        if( fill['colors'] ) { //sometimes the colors object isn't initialized so we have to assign it directly (?)
+            fill['colors'].value = vmlColors.join( ',' );
+        } else {
+            fill['colors'] = vmlColors.join( ',' );
+        }
+    },
+
+
+    /**
+     * Hide the actual background image and color of the element.
+     */
+    hideBackground: function() {
+        var rs = this.targetElement.runtimeStyle;
+        rs.backgroundImage = 'url(about:blank)'; //ensures the background area reacts to mouse events
+        rs.backgroundColor = 'transparent';
+    },
+
+    destroy: function() {
+        PIE.RendererBase.destroy.call( this );
+        var rs = this.targetElement.runtimeStyle;
+        rs.backgroundImage = rs.backgroundColor = '';
+    }
+
+} );
+/**
+ * Renderer for element borders.
+ * @constructor
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ * @param {PIE.RootRenderer} parent
+ */
+PIE.BorderRenderer = PIE.RendererBase.newRenderer( {
+
+    boxZIndex: 4,
+    boxName: 'border',
+
+    needsUpdate: function() {
+        var si = this.styleInfos;
+        return si.borderInfo.changed() || si.borderRadiusInfo.changed();
+    },
+
+    isActive: function() {
+        var si = this.styleInfos;
+        return si.borderRadiusInfo.isActive() &&
+               !si.borderImageInfo.isActive() &&
+               si.borderInfo.isActive(); //check BorderStyleInfo last because it's the most expensive
+    },
+
+    /**
+     * Draw the border shape(s)
+     */
+    draw: function() {
+        var el = this.targetElement,
+            props = this.styleInfos.borderInfo.getProps(),
+            bounds = this.boundsInfo.getBounds(),
+            w = bounds.w,
+            h = bounds.h,
+            shape, stroke, s,
+            segments, seg, i, len;
+
+        if( props ) {
+            this.hideBorder();
+
+            segments = this.getBorderSegments( 2 );
+            for( i = 0, len = segments.length; i < len; i++) {
+                seg = segments[i];
+                shape = this.getShape( 'borderPiece' + i, seg.stroke ? 'stroke' : 'fill', this.getBox() );
+                shape.coordsize = w * 2 + ',' + h * 2;
+                shape.coordorigin = '1,1';
+                shape.path = seg.path;
+                s = shape.style;
+                s.width = w;
+                s.height = h;
+
+                shape.filled = !!seg.fill;
+                shape.stroked = !!seg.stroke;
+                if( seg.stroke ) {
+                    stroke = shape.stroke;
+                    stroke['weight'] = seg.weight + 'px';
+                    stroke.color = seg.color.colorValue( el );
+                    stroke['dashstyle'] = seg.stroke === 'dashed' ? '2 2' : seg.stroke === 'dotted' ? '1 1' : 'solid';
+                    stroke['linestyle'] = seg.stroke === 'double' && seg.weight > 2 ? 'ThinThin' : 'Single';
+                } else {
+                    shape.fill.color = seg.fill.colorValue( el );
+                }
+            }
+
+            // remove any previously-created border shapes which didn't get used above
+            while( this.deleteShape( 'borderPiece' + i++ ) ) {}
+        }
+    },
+
+
+    /**
+     * Get the VML path definitions for the border segment(s).
+     * @param {number=} mult If specified, all coordinates will be multiplied by this number
+     * @return {Array.<string>}
+     */
+    getBorderSegments: function( mult ) {
+        var el = this.targetElement,
+            bounds, elW, elH,
+            borderInfo = this.styleInfos.borderInfo,
+            segments = [],
+            floor, ceil, wT, wR, wB, wL,
+            round = Math.round,
+            borderProps, radiusInfo, radii, widths, styles, colors;
+
+        if( borderInfo.isActive() ) {
+            borderProps = borderInfo.getProps();
+
+            widths = borderProps.widths;
+            styles = borderProps.styles;
+            colors = borderProps.colors;
+
+            if( borderProps.widthsSame && borderProps.stylesSame && borderProps.colorsSame ) {
+                if( colors['t'].alpha() > 0 ) {
+                    // shortcut for identical border on all sides - only need 1 stroked shape
+                    wT = widths['t'].pixels( el ); //thickness
+                    wR = wT / 2; //shrink
+                    segments.push( {
+                        path: this.getBoxPath( { t: wR, r: wR, b: wR, l: wR }, mult ),
+                        stroke: styles['t'],
+                        color: colors['t'],
+                        weight: wT
+                    } );
+                }
+            }
+            else {
+                mult = mult || 1;
+                bounds = this.boundsInfo.getBounds();
+                elW = bounds.w;
+                elH = bounds.h;
+
+                wT = round( widths['t'].pixels( el ) );
+                wR = round( widths['r'].pixels( el ) );
+                wB = round( widths['b'].pixels( el ) );
+                wL = round( widths['l'].pixels( el ) );
+                var pxWidths = {
+                    't': wT,
+                    'r': wR,
+                    'b': wB,
+                    'l': wL
+                };
+
+                radiusInfo = this.styleInfos.borderRadiusInfo;
+                if( radiusInfo.isActive() ) {
+                    radii = this.getRadiiPixels( radiusInfo.getProps() );
+                }
+
+                floor = Math.floor;
+                ceil = Math.ceil;
+
+                function radius( xy, corner ) {
+                    return radii ? radii[ xy ][ corner ] : 0;
+                }
+
+                function curve( corner, shrinkX, shrinkY, startAngle, ccw, doMove ) {
+                    var rx = radius( 'x', corner),
+                        ry = radius( 'y', corner),
+                        deg = 65535,
+                        isRight = corner.charAt( 1 ) === 'r',
+                        isBottom = corner.charAt( 0 ) === 'b';
+                    return ( rx > 0 && ry > 0 ) ?
+                                ( doMove ? 'al' : 'ae' ) +
+                                ( isRight ? ceil( elW - rx ) : floor( rx ) ) * mult + ',' + // center x
+                                ( isBottom ? ceil( elH - ry ) : floor( ry ) ) * mult + ',' + // center y
+                                ( floor( rx ) - shrinkX ) * mult + ',' + // width
+                                ( floor( ry ) - shrinkY ) * mult + ',' + // height
+                                ( startAngle * deg ) + ',' + // start angle
+                                ( 45 * deg * ( ccw ? 1 : -1 ) // angle change
+                            ) : (
+                                ( doMove ? 'm' : 'l' ) +
+                                ( isRight ? elW - shrinkX : shrinkX ) * mult + ',' +
+                                ( isBottom ? elH - shrinkY : shrinkY ) * mult
+                            );
+                }
+
+                function line( side, shrink, ccw, doMove ) {
+                    var
+                        start = (
+                            side === 't' ?
+                                floor( radius( 'x', 'tl') ) * mult + ',' + ceil( shrink ) * mult :
+                            side === 'r' ?
+                                ceil( elW - shrink ) * mult + ',' + floor( radius( 'y', 'tr') ) * mult :
+                            side === 'b' ?
+                                ceil( elW - radius( 'x', 'br') ) * mult + ',' + floor( elH - shrink ) * mult :
+                            // side === 'l' ?
+                                floor( shrink ) * mult + ',' + ceil( elH - radius( 'y', 'bl') ) * mult
+                        ),
+                        end = (
+                            side === 't' ?
+                                ceil( elW - radius( 'x', 'tr') ) * mult + ',' + ceil( shrink ) * mult :
+                            side === 'r' ?
+                                ceil( elW - shrink ) * mult + ',' + ceil( elH - radius( 'y', 'br') ) * mult :
+                            side === 'b' ?
+                                floor( radius( 'x', 'bl') ) * mult + ',' + floor( elH - shrink ) * mult :
+                            // side === 'l' ?
+                                floor( shrink ) * mult + ',' + floor( radius( 'y', 'tl') ) * mult
+                        );
+                    return ccw ? ( doMove ? 'm' + end : '' ) + 'l' + start :
+                                 ( doMove ? 'm' + start : '' ) + 'l' + end;
+                }
+
+
+                function addSide( side, sideBefore, sideAfter, cornerBefore, cornerAfter, baseAngle ) {
+                    var vert = side === 'l' || side === 'r',
+                        sideW = pxWidths[ side ],
+                        beforeX, beforeY, afterX, afterY;
+
+                    if( sideW > 0 && styles[ side ] !== 'none' && colors[ side ].alpha() > 0 ) {
+                        beforeX = pxWidths[ vert ? side : sideBefore ];
+                        beforeY = pxWidths[ vert ? sideBefore : side ];
+                        afterX = pxWidths[ vert ? side : sideAfter ];
+                        afterY = pxWidths[ vert ? sideAfter : side ];
+
+                        if( styles[ side ] === 'dashed' || styles[ side ] === 'dotted' ) {
+                            segments.push( {
+                                path: curve( cornerBefore, beforeX, beforeY, baseAngle + 45, 0, 1 ) +
+                                      curve( cornerBefore, 0, 0, baseAngle, 1, 0 ),
+                                fill: colors[ side ]
+                            } );
+                            segments.push( {
+                                path: line( side, sideW / 2, 0, 1 ),
+                                stroke: styles[ side ],
+                                weight: sideW,
+                                color: colors[ side ]
+                            } );
+                            segments.push( {
+                                path: curve( cornerAfter, afterX, afterY, baseAngle, 0, 1 ) +
+                                      curve( cornerAfter, 0, 0, baseAngle - 45, 1, 0 ),
+                                fill: colors[ side ]
+                            } );
+                        }
+                        else {
+                            segments.push( {
+                                path: curve( cornerBefore, beforeX, beforeY, baseAngle + 45, 0, 1 ) +
+                                      line( side, sideW, 0, 0 ) +
+                                      curve( cornerAfter, afterX, afterY, baseAngle, 0, 0 ) +
+
+                                      ( styles[ side ] === 'double' && sideW > 2 ?
+                                              curve( cornerAfter, afterX - floor( afterX / 3 ), afterY - floor( afterY / 3 ), baseAngle - 45, 1, 0 ) +
+                                              line( side, ceil( sideW / 3 * 2 ), 1, 0 ) +
+                                              curve( cornerBefore, beforeX - floor( beforeX / 3 ), beforeY - floor( beforeY / 3 ), baseAngle, 1, 0 ) +
+                                              'x ' +
+                                              curve( cornerBefore, floor( beforeX / 3 ), floor( beforeY / 3 ), baseAngle + 45, 0, 1 ) +
+                                              line( side, floor( sideW / 3 ), 1, 0 ) +
+                                              curve( cornerAfter, floor( afterX / 3 ), floor( afterY / 3 ), baseAngle, 0, 0 )
+                                          : '' ) +
+
+                                      curve( cornerAfter, 0, 0, baseAngle - 45, 1, 0 ) +
+                                      line( side, 0, 1, 0 ) +
+                                      curve( cornerBefore, 0, 0, baseAngle, 1, 0 ),
+                                fill: colors[ side ]
+                            } );
+                        }
+                    }
+                }
+
+                addSide( 't', 'l', 'r', 'tl', 'tr', 90 );
+                addSide( 'r', 't', 'b', 'tr', 'br', 0 );
+                addSide( 'b', 'r', 'l', 'br', 'bl', -90 );
+                addSide( 'l', 'b', 't', 'bl', 'tl', -180 );
+            }
+        }
+
+        return segments;
+    },
+
+    destroy: function() {
+        var me = this;
+        if (me.finalized || !me.styleInfos.borderImageInfo.isActive()) {
+            me.targetElement.runtimeStyle.borderColor = '';
+        }
+        PIE.RendererBase.destroy.call( me );
+    }
+
+
+} );
+/**
+ * Renderer for border-image
+ * @constructor
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ * @param {PIE.RootRenderer} parent
+ */
+PIE.BorderImageRenderer = PIE.RendererBase.newRenderer( {
+
+    boxZIndex: 5,
+    pieceNames: [ 't', 'tr', 'r', 'br', 'b', 'bl', 'l', 'tl', 'c' ],
+
+    needsUpdate: function() {
+        return this.styleInfos.borderImageInfo.changed();
+    },
+
+    isActive: function() {
+        return this.styleInfos.borderImageInfo.isActive();
+    },
+
+    draw: function() {
+        this.getBox(); //make sure pieces are created
+
+        var props = this.styleInfos.borderImageInfo.getProps(),
+            borderProps = this.styleInfos.borderInfo.getProps(),
+            bounds = this.boundsInfo.getBounds(),
+            el = this.targetElement,
+            pieces = this.pieces;
+
+        PIE.Util.withImageSize( props.src, function( imgSize ) {
+            var elW = bounds.w,
+                elH = bounds.h,
+                zero = PIE.getLength( '0' ),
+                widths = props.widths || ( borderProps ? borderProps.widths : { 't': zero, 'r': zero, 'b': zero, 'l': zero } ),
+                widthT = widths['t'].pixels( el ),
+                widthR = widths['r'].pixels( el ),
+                widthB = widths['b'].pixels( el ),
+                widthL = widths['l'].pixels( el ),
+                slices = props.slice,
+                sliceT = slices['t'].pixels( el ),
+                sliceR = slices['r'].pixels( el ),
+                sliceB = slices['b'].pixels( el ),
+                sliceL = slices['l'].pixels( el );
+
+            // Piece positions and sizes
+            function setSizeAndPos( piece, w, h, x, y ) {
+                var s = pieces[piece].style,
+                    max = Math.max;
+                s.width = max(w, 0);
+                s.height = max(h, 0);
+                s.left = x;
+                s.top = y;
+            }
+            setSizeAndPos( 'tl', widthL, widthT, 0, 0 );
+            setSizeAndPos( 't', elW - widthL - widthR, widthT, widthL, 0 );
+            setSizeAndPos( 'tr', widthR, widthT, elW - widthR, 0 );
+            setSizeAndPos( 'r', widthR, elH - widthT - widthB, elW - widthR, widthT );
+            setSizeAndPos( 'br', widthR, widthB, elW - widthR, elH - widthB );
+            setSizeAndPos( 'b', elW - widthL - widthR, widthB, widthL, elH - widthB );
+            setSizeAndPos( 'bl', widthL, widthB, 0, elH - widthB );
+            setSizeAndPos( 'l', widthL, elH - widthT - widthB, 0, widthT );
+            setSizeAndPos( 'c', elW - widthL - widthR, elH - widthT - widthB, widthL, widthT );
+
+
+            // image croppings
+            function setCrops( sides, crop, val ) {
+                for( var i=0, len=sides.length; i < len; i++ ) {
+                    pieces[ sides[i] ]['imagedata'][ crop ] = val;
+                }
+            }
+
+            // corners
+            setCrops( [ 'tl', 't', 'tr' ], 'cropBottom', ( imgSize.h - sliceT ) / imgSize.h );
+            setCrops( [ 'tl', 'l', 'bl' ], 'cropRight', ( imgSize.w - sliceL ) / imgSize.w );
+            setCrops( [ 'bl', 'b', 'br' ], 'cropTop', ( imgSize.h - sliceB ) / imgSize.h );
+            setCrops( [ 'tr', 'r', 'br' ], 'cropLeft', ( imgSize.w - sliceR ) / imgSize.w );
+
+            // edges and center
+            // TODO right now this treats everything like 'stretch', need to support other schemes
+            //if( props.repeat.v === 'stretch' ) {
+                setCrops( [ 'l', 'r', 'c' ], 'cropTop', sliceT / imgSize.h );
+                setCrops( [ 'l', 'r', 'c' ], 'cropBottom', sliceB / imgSize.h );
+            //}
+            //if( props.repeat.h === 'stretch' ) {
+                setCrops( [ 't', 'b', 'c' ], 'cropLeft', sliceL / imgSize.w );
+                setCrops( [ 't', 'b', 'c' ], 'cropRight', sliceR / imgSize.w );
+            //}
+
+            // center fill
+            pieces['c'].style.display = props.fill ? '' : 'none';
+        }, this );
+    },
+
+    getBox: function() {
+        var box = this.parent.getLayer( this.boxZIndex ),
+            s, piece, i,
+            pieceNames = this.pieceNames,
+            len = pieceNames.length;
+
+        if( !box ) {
+            box = doc.createElement( 'border-image' );
+            s = box.style;
+            s.position = 'absolute';
+
+            this.pieces = {};
+
+            for( i = 0; i < len; i++ ) {
+                piece = this.pieces[ pieceNames[i] ] = PIE.Util.createVmlElement( 'rect' );
+                piece.appendChild( PIE.Util.createVmlElement( 'imagedata' ) );
+                s = piece.style;
+                s['behavior'] = 'url(#default#VML)';
+                s.position = "absolute";
+                s.top = s.left = 0;
+                piece['imagedata'].src = this.styleInfos.borderImageInfo.getProps().src;
+                piece.stroked = false;
+                piece.filled = false;
+                box.appendChild( piece );
+            }
+
+            this.parent.addLayer( this.boxZIndex, box );
+        }
+
+        return box;
+    },
+
+    prepareUpdate: function() {
+        if (this.isActive()) {
+            var me = this,
+                el = me.targetElement,
+                rs = el.runtimeStyle,
+                widths = me.styleInfos.borderImageInfo.getProps().widths;
+
+            // Force border-style to solid so it doesn't collapse
+            rs.borderStyle = 'solid';
+
+            // If widths specified in border-image shorthand, override border-width
+            // NOTE px units needed here as this gets used by the IE9 renderer too
+            if ( widths ) {
+                rs.borderTopWidth = widths['t'].pixels( el ) + 'px';
+                rs.borderRightWidth = widths['r'].pixels( el ) + 'px';
+                rs.borderBottomWidth = widths['b'].pixels( el ) + 'px';
+                rs.borderLeftWidth = widths['l'].pixels( el ) + 'px';
+            }
+
+            // Make the border transparent
+            me.hideBorder();
+        }
+    },
+
+    destroy: function() {
+        var me = this,
+            rs = me.targetElement.runtimeStyle;
+        rs.borderStyle = '';
+        if (me.finalized || !me.styleInfos.borderInfo.isActive()) {
+            rs.borderColor = rs.borderWidth = '';
+        }
+        PIE.RendererBase.destroy.call( this );
+    }
+
+} );
+/**
+ * Renderer for outset box-shadows
+ * @constructor
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ * @param {PIE.RootRenderer} parent
+ */
+PIE.BoxShadowOutsetRenderer = PIE.RendererBase.newRenderer( {
+
+    boxZIndex: 1,
+    boxName: 'outset-box-shadow',
+
+    needsUpdate: function() {
+        var si = this.styleInfos;
+        return si.boxShadowInfo.changed() || si.borderRadiusInfo.changed();
+    },
+
+    isActive: function() {
+        var boxShadowInfo = this.styleInfos.boxShadowInfo;
+        return boxShadowInfo.isActive() && boxShadowInfo.getProps().outset[0];
+    },
+
+    draw: function() {
+        var me = this,
+            el = this.targetElement,
+            box = this.getBox(),
+            styleInfos = this.styleInfos,
+            shadowInfos = styleInfos.boxShadowInfo.getProps().outset,
+            radii = styleInfos.borderRadiusInfo.getProps(),
+            len = shadowInfos.length,
+            i = len, j,
+            bounds = this.boundsInfo.getBounds(),
+            w = bounds.w,
+            h = bounds.h,
+            clipAdjust = PIE.ieVersion === 8 ? 1 : 0, //workaround for IE8 bug where VML leaks out top/left of clip region by 1px
+            corners = [ 'tl', 'tr', 'br', 'bl' ], corner,
+            shadowInfo, shape, fill, ss, xOff, yOff, spread, blur, shrink, color, alpha, path,
+            totalW, totalH, focusX, focusY, isBottom, isRight;
+
+
+        function getShadowShape( index, corner, xOff, yOff, color, blur, path ) {
+            var shape = me.getShape( 'shadow' + index + corner, 'fill', box, len - index ),
+                fill = shape.fill;
+
+            // Position and size
+            shape['coordsize'] = w * 2 + ',' + h * 2;
+            shape['coordorigin'] = '1,1';
+
+            // Color and opacity
+            shape['stroked'] = false;
+            shape['filled'] = true;
+            fill.color = color.colorValue( el );
+            if( blur ) {
+                fill['type'] = 'gradienttitle'; //makes the VML gradient follow the shape's outline - hooray for undocumented features?!?!
+                fill['color2'] = fill.color;
+                fill['opacity'] = 0;
+            }
+
+            // Path
+            shape.path = path;
+
+            // This needs to go last for some reason, to prevent rendering at incorrect size
+            ss = shape.style;
+            ss.left = xOff;
+            ss.top = yOff;
+            ss.width = w;
+            ss.height = h;
+
+            return shape;
+        }
+
+
+        while( i-- ) {
+            shadowInfo = shadowInfos[ i ];
+            xOff = shadowInfo.xOffset.pixels( el );
+            yOff = shadowInfo.yOffset.pixels( el );
+            spread = shadowInfo.spread.pixels( el );
+            blur = shadowInfo.blur.pixels( el );
+            color = shadowInfo.color;
+            // Shape path
+            shrink = -spread - blur;
+            if( !radii && blur ) {
+                // If blurring, use a non-null border radius info object so that getBoxPath will
+                // round the corners of the expanded shadow shape rather than squaring them off.
+                radii = PIE.BorderRadiusStyleInfo.ALL_ZERO;
+            }
+            path = this.getBoxPath( { t: shrink, r: shrink, b: shrink, l: shrink }, 2, radii );
+
+            if( blur ) {
+                totalW = ( spread + blur ) * 2 + w;
+                totalH = ( spread + blur ) * 2 + h;
+                focusX = totalW ? blur * 2 / totalW : 0;
+                focusY = totalH ? blur * 2 / totalH : 0;
+                if( blur - spread > w / 2 || blur - spread > h / 2 ) {
+                    // If the blur is larger than half the element's narrowest dimension, we cannot do
+                    // this with a single shape gradient, because its focussize would have to be less than
+                    // zero which results in ugly artifacts. Instead we create four shapes, each with its
+                    // gradient focus past center, and then clip them so each only shows the quadrant
+                    // opposite the focus.
+                    for( j = 4; j--; ) {
+                        corner = corners[j];
+                        isBottom = corner.charAt( 0 ) === 'b';
+                        isRight = corner.charAt( 1 ) === 'r';
+                        shape = getShadowShape( i, corner, xOff, yOff, color, blur, path );
+                        fill = shape.fill;
+                        fill['focusposition'] = ( isRight ? 1 - focusX : focusX ) + ',' +
+                                                ( isBottom ? 1 - focusY : focusY );
+                        fill['focussize'] = '0,0';
+
+                        // Clip to show only the appropriate quadrant. Add 1px to the top/left clip values
+                        // in IE8 to prevent a bug where IE8 displays one pixel outside the clip region.
+                        shape.style.clip = 'rect(' + ( ( isBottom ? totalH / 2 : 0 ) + clipAdjust ) + 'px,' +
+                                                     ( isRight ? totalW : totalW / 2 ) + 'px,' +
+                                                     ( isBottom ? totalH : totalH / 2 ) + 'px,' +
+                                                     ( ( isRight ? totalW / 2 : 0 ) + clipAdjust ) + 'px)';
+                    }
+                } else {
+                    // TODO delete old quadrant shapes if resizing expands past the barrier
+                    shape = getShadowShape( i, '', xOff, yOff, color, blur, path );
+                    fill = shape.fill;
+                    fill['focusposition'] = focusX + ',' + focusY;
+                    fill['focussize'] = ( 1 - focusX * 2 ) + ',' + ( 1 - focusY * 2 );
+                }
+            } else {
+                shape = getShadowShape( i, '', xOff, yOff, color, blur, path );
+                alpha = color.alpha();
+                if( alpha < 1 ) {
+                    // shape.style.filter = 'alpha(opacity=' + ( alpha * 100 ) + ')';
+                    // ss.filter = 'progid:DXImageTransform.Microsoft.BasicImage(opacity=' + ( alpha  ) + ')';
+                    shape.fill.opacity = alpha;
+                }
+            }
+        }
+    }
+
+} );
+/**
+ * Renderer for re-rendering img elements using VML. Kicks in if the img has
+ * a border-radius applied, or if the -pie-png-fix flag is set.
+ * @constructor
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ * @param {PIE.RootRenderer} parent
+ */
+PIE.ImgRenderer = PIE.RendererBase.newRenderer( {
+
+    boxZIndex: 6,
+    boxName: 'imgEl',
+
+    needsUpdate: function() {
+        var si = this.styleInfos;
+        return this.targetElement.src !== this._lastSrc || si.borderRadiusInfo.changed();
+    },
+
+    isActive: function() {
+        var si = this.styleInfos;
+        return si.borderRadiusInfo.isActive() || si.backgroundInfo.isPngFix();
+    },
+
+    draw: function() {
+        this._lastSrc = src;
+        this.hideActualImg();
+
+        var shape = this.getShape( 'img', 'fill', this.getBox() ),
+            fill = shape.fill,
+            bounds = this.boundsInfo.getBounds(),
+            w = bounds.w,
+            h = bounds.h,
+            borderProps = this.styleInfos.borderInfo.getProps(),
+            borderWidths = borderProps && borderProps.widths,
+            el = this.targetElement,
+            src = el.src,
+            round = Math.round,
+            cs = el.currentStyle,
+            getLength = PIE.getLength,
+            s, zero;
+
+        // In IE6, the BorderRenderer will have hidden the border by moving the border-width to
+        // the padding; therefore we want to pretend the borders have no width so they aren't doubled
+        // when adding in the current padding value below.
+        if( !borderWidths || PIE.ieVersion < 7 ) {
+            zero = PIE.getLength( '0' );
+            borderWidths = { 't': zero, 'r': zero, 'b': zero, 'l': zero };
+        }
+
+        shape.stroked = false;
+        fill.type = 'frame';
+        fill.src = src;
+        fill.position = (w ? 0.5 / w : 0) + ',' + (h ? 0.5 / h : 0);
+        shape.coordsize = w * 2 + ',' + h * 2;
+        shape.coordorigin = '1,1';
+        shape.path = this.getBoxPath( {
+            t: round( borderWidths['t'].pixels( el ) + getLength( cs.paddingTop ).pixels( el ) ),
+            r: round( borderWidths['r'].pixels( el ) + getLength( cs.paddingRight ).pixels( el ) ),
+            b: round( borderWidths['b'].pixels( el ) + getLength( cs.paddingBottom ).pixels( el ) ),
+            l: round( borderWidths['l'].pixels( el ) + getLength( cs.paddingLeft ).pixels( el ) )
+        }, 2 );
+        s = shape.style;
+        s.width = w;
+        s.height = h;
+    },
+
+    hideActualImg: function() {
+        this.targetElement.runtimeStyle.filter = 'alpha(opacity=0)';
+    },
+
+    destroy: function() {
+        PIE.RendererBase.destroy.call( this );
+        this.targetElement.runtimeStyle.filter = '';
+    }
+
+} );
+/**
+ * Root renderer for IE9; manages the rendering layers in the element's background
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ */
+PIE.IE9RootRenderer = PIE.RendererBase.newRenderer( {
+
+    updatePos: PIE.emptyFn,
+    updateSize: PIE.emptyFn,
+    updateVisibility: PIE.emptyFn,
+    updateProps: PIE.emptyFn,
+
+    outerCommasRE: /^,+|,+$/g,
+    innerCommasRE: /,+/g,
+
+    setBackgroundLayer: function(zIndex, bg) {
+        var me = this,
+            bgLayers = me._bgLayers || ( me._bgLayers = [] ),
+            undef;
+        bgLayers[zIndex] = bg || undef;
+    },
+
+    finishUpdate: function() {
+        var me = this,
+            bgLayers = me._bgLayers,
+            bg;
+        if( bgLayers && ( bg = bgLayers.join( ',' ).replace( me.outerCommasRE, '' ).replace( me.innerCommasRE, ',' ) ) !== me._lastBg ) {
+            me._lastBg = me.targetElement.runtimeStyle.background = bg;
+        }
+    },
+
+    destroy: function() {
+        this.targetElement.runtimeStyle.background = '';
+        delete this._bgLayers;
+    }
+
+} );
+/**
+ * Renderer for element backgrounds, specific for IE9. Only handles translating CSS3 gradients
+ * to an equivalent SVG data URI.
+ * @constructor
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ */
+PIE.IE9BackgroundRenderer = PIE.RendererBase.newRenderer( {
+
+    bgLayerZIndex: 1,
+
+    needsUpdate: function() {
+        var si = this.styleInfos;
+        return si.backgroundInfo.changed();
+    },
+
+    isActive: function() {
+        var si = this.styleInfos;
+        return si.backgroundInfo.isActive() || si.borderImageInfo.isActive();
+    },
+
+    draw: function() {
+        var me = this,
+            props = me.styleInfos.backgroundInfo.getProps(),
+            bg, images, i = 0, img, bgAreaSize, bgSize;
+
+        if ( props ) {
+            bg = [];
+
+            images = props.bgImages;
+            if ( images ) {
+                while( img = images[ i++ ] ) {
+                    if (img.imgType === 'linear-gradient' ) {
+                        bgAreaSize = me.getBgAreaSize( img.bgOrigin );
+                        bgSize = ( img.bgSize || PIE.BgSize.DEFAULT ).pixels(
+                            me.targetElement, bgAreaSize.w, bgAreaSize.h, bgAreaSize.w, bgAreaSize.h
+                        ),
+                        bg.push(
+                            'url(data:image/svg+xml,' + escape( me.getGradientSvg( img, bgSize.w, bgSize.h ) ) + ') ' +
+                            me.bgPositionToString( img.bgPosition ) + ' / ' + bgSize.w + 'px ' + bgSize.h + 'px ' +
+                            ( img.bgAttachment || '' ) + ' ' + ( img.bgOrigin || '' ) + ' ' + ( img.bgClip || '' )
+                        );
+                    } else {
+                        bg.push( img.origString );
+                    }
+                }
+            }
+
+            if ( props.color ) {
+                bg.push( props.color.val );
+            }
+
+            me.parent.setBackgroundLayer(me.bgLayerZIndex, bg.join(','));
+        }
+    },
+
+    bgPositionToString: function( bgPosition ) {
+        return bgPosition ? bgPosition.tokens.map(function(token) {
+            return token.tokenValue;
+        }).join(' ') : '0 0';
+    },
+
+    getBgAreaSize: function( bgOrigin ) {
+        var me = this,
+            el = me.targetElement,
+            bounds = me.boundsInfo.getBounds(),
+            elW = bounds.w,
+            elH = bounds.h,
+            w = elW,
+            h = elH,
+            borders, getLength, cs;
+
+        if( bgOrigin !== 'border-box' ) {
+            borders = me.styleInfos.borderInfo.getProps();
+            if( borders && ( borders = borders.widths ) ) {
+                w -= borders[ 'l' ].pixels( el ) + borders[ 'l' ].pixels( el );
+                h -= borders[ 't' ].pixels( el ) + borders[ 'b' ].pixels( el );
+            }
+        }
+
+        if ( bgOrigin === 'content-box' ) {
+            getLength = PIE.getLength;
+            cs = el.currentStyle;
+            w -= getLength( cs.paddingLeft ).pixels( el ) + getLength( cs.paddingRight ).pixels( el );
+            h -= getLength( cs.paddingTop ).pixels( el ) + getLength( cs.paddingBottom ).pixels( el );
+        }
+
+        return { w: w, h: h };
+    },
+
+    getGradientSvg: function( info, bgWidth, bgHeight ) {
+        var el = this.targetElement,
+            stopsInfo = info.stops,
+            stopCount = stopsInfo.length,
+            metrics = PIE.GradientUtil.getGradientMetrics( el, bgWidth, bgHeight, info ),
+            startX = metrics.startX,
+            startY = metrics.startY,
+            endX = metrics.endX,
+            endY = metrics.endY,
+            lineLength = metrics.lineLength,
+            stopPx,
+            i, j, before, after,
+            svg;
+
+        // Find the pixel offsets along the CSS3 gradient-line for each stop.
+        stopPx = [];
+        for( i = 0; i < stopCount; i++ ) {
+            stopPx.push( stopsInfo[i].offset ? stopsInfo[i].offset.pixels( el, lineLength ) :
+                         i === 0 ? 0 : i === stopCount - 1 ? lineLength : null );
+        }
+        // Fill in gaps with evenly-spaced offsets
+        for( i = 1; i < stopCount; i++ ) {
+            if( stopPx[ i ] === null ) {
+                before = stopPx[ i - 1 ];
+                j = i;
+                do {
+                    after = stopPx[ ++j ];
+                } while( after === null );
+                stopPx[ i ] = before + ( after - before ) / ( j - i + 1 );
+            }
+        }
+
+        svg = [
+            '<svg width="' + bgWidth + '" height="' + bgHeight + '" xmlns="http://www.w3.org/2000/svg">' +
+                '<defs>' +
+                    '<linearGradient id="g" gradientUnits="userSpaceOnUse"' +
+                    ' x1="' + ( startX / bgWidth * 100 ) + '%" y1="' + ( startY / bgHeight * 100 ) + '%" x2="' + ( endX / bgWidth * 100 ) + '%" y2="' + ( endY / bgHeight * 100 ) + '%">'
+        ];
+
+        // Convert to percentage along the SVG gradient line and add to the stops list
+        for( i = 0; i < stopCount; i++ ) {
+            svg.push(
+                '<stop offset="' + ( stopPx[ i ] / lineLength ) +
+                    '" stop-color="' + stopsInfo[i].color.colorValue( el ) +
+                    '" stop-opacity="' + stopsInfo[i].color.alpha() + '"/>'
+            );
+        }
+
+        svg.push(
+                    '</linearGradient>' +
+                '</defs>' +
+                '<rect width="100%" height="100%" fill="url(#g)"/>' +
+            '</svg>'
+        );
+
+        return svg.join( '' );
+    },
+
+    destroy: function() {
+        this.parent.setBackgroundLayer( this.bgLayerZIndex );
+    }
+
+} );
+/**
+ * Renderer for border-image
+ * @constructor
+ * @param {Element} el The target element
+ * @param {Object} styleInfos The StyleInfo objects
+ * @param {PIE.RootRenderer} parent
+ */
+PIE.IE9BorderImageRenderer = PIE.RendererBase.newRenderer( {
+
+    REPEAT: 'repeat',
+    STRETCH: 'stretch',
+    ROUND: 'round',
+
+    bgLayerZIndex: 0,
+
+    needsUpdate: function() {
+        return this.styleInfos.borderImageInfo.changed();
+    },
+
+    isActive: function() {
+        return this.styleInfos.borderImageInfo.isActive();
+    },
+
+    draw: function() {
+        var me = this,
+            props = me.styleInfos.borderImageInfo.getProps(),
+            borderProps = me.styleInfos.borderInfo.getProps(),
+            bounds = me.boundsInfo.getBounds(),
+            repeat = props.repeat,
+            repeatH = repeat.h,
+            repeatV = repeat.v,
+            el = me.targetElement,
+            isAsync = 0;
+
+        PIE.Util.withImageSize( props.src, function( imgSize ) {
+            var elW = bounds.w,
+                elH = bounds.h,
+                imgW = imgSize.w,
+                imgH = imgSize.h,
+
+                // The image cannot be referenced as a URL directly in the SVG because IE9 throws a strange
+                // security exception (perhaps due to cross-origin policy within data URIs?) Therefore we
+                // work around this by converting the image data into a data URI itself using a transient
+                // canvas. This unfortunately requires the border-image src to be within the same domain,
+                // which isn't a limitation in true border-image, so we need to try and find a better fix.
+                imgSrc = me.imageToDataURI( props.src, imgW, imgH ),
+
+                REPEAT = me.REPEAT,
+                STRETCH = me.STRETCH,
+                ROUND = me.ROUND,
+                ceil = Math.ceil,
+
+                zero = PIE.getLength( '0' ),
+                widths = props.widths || ( borderProps ? borderProps.widths : { 't': zero, 'r': zero, 'b': zero, 'l': zero } ),
+                widthT = widths['t'].pixels( el ),
+                widthR = widths['r'].pixels( el ),
+                widthB = widths['b'].pixels( el ),
+                widthL = widths['l'].pixels( el ),
+                slices = props.slice,
+                sliceT = slices['t'].pixels( el ),
+                sliceR = slices['r'].pixels( el ),
+                sliceB = slices['b'].pixels( el ),
+                sliceL = slices['l'].pixels( el ),
+                centerW = elW - widthL - widthR,
+                middleH = elH - widthT - widthB,
+                imgCenterW = imgW - sliceL - sliceR,
+                imgMiddleH = imgH - sliceT - sliceB,
+
+                // Determine the size of each tile - 'round' is handled below
+                tileSizeT = repeatH === STRETCH ? centerW : imgCenterW * widthT / sliceT,
+                tileSizeR = repeatV === STRETCH ? middleH : imgMiddleH * widthR / sliceR,
+                tileSizeB = repeatH === STRETCH ? centerW : imgCenterW * widthB / sliceB,
+                tileSizeL = repeatV === STRETCH ? middleH : imgMiddleH * widthL / sliceL,
+
+                svg,
+                patterns = [],
+                rects = [],
+                i = 0;
+
+            // For 'round', subtract from each tile's size enough so that they fill the space a whole number of times
+            if (repeatH === ROUND) {
+                tileSizeT -= (tileSizeT - (centerW % tileSizeT || tileSizeT)) / ceil(centerW / tileSizeT);
+                tileSizeB -= (tileSizeB - (centerW % tileSizeB || tileSizeB)) / ceil(centerW / tileSizeB);
+            }
+            if (repeatV === ROUND) {
+                tileSizeR -= (tileSizeR - (middleH % tileSizeR || tileSizeR)) / ceil(middleH / tileSizeR);
+                tileSizeL -= (tileSizeL - (middleH % tileSizeL || tileSizeL)) / ceil(middleH / tileSizeL);
+            }
+
+
+            // Build the SVG for the border-image rendering. Add each piece as a pattern, which is then stretched
+            // or repeated as the fill of a rect of appropriate size.
+            svg = [
+                '<svg width="' + elW + '" height="' + elH + '" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">'
+            ];
+
+            function addImage( x, y, w, h, cropX, cropY, cropW, cropH, tileW, tileH ) {
+                patterns.push(
+                    '<pattern patternUnits="userSpaceOnUse" id="pattern' + i + '" ' +
+                            'x="' + (repeatH === REPEAT ? x + w / 2 - tileW / 2 : x) + '" ' +
+                            'y="' + (repeatV === REPEAT ? y + h / 2 - tileH / 2 : y) + '" ' +
+                            'width="' + tileW + '" height="' + tileH + '">' +
+                        '<svg width="' + tileW + '" height="' + tileH + '" viewBox="' + cropX + ' ' + cropY + ' ' + cropW + ' ' + cropH + '" preserveAspectRatio="none">' +
+                            '<image xlink:href="' + imgSrc + '" x="0" y="0" width="' + imgW + '" height="' + imgH + '" />' +
+                        '</svg>' +
+                    '</pattern>'
+                );
+                rects.push(
+                    '<rect x="' + x + '" y="' + y + '" width="' + w + '" height="' + h + '" fill="url(#pattern' + i + ')" />'
+                );
+                i++;
+            }
+            addImage( 0, 0, widthL, widthT, 0, 0, sliceL, sliceT, widthL, widthT ); // top left
+            addImage( widthL, 0, centerW, widthT, sliceL, 0, imgCenterW, sliceT, tileSizeT, widthT ); // top center
+            addImage( elW - widthR, 0, widthR, widthT, imgW - sliceR, 0, sliceR, sliceT, widthR, widthT ); // top right
+            addImage( 0, widthT, widthL, middleH, 0, sliceT, sliceL, imgMiddleH, widthL, tileSizeL ); // middle left
+            if ( props.fill ) { // center fill
+                addImage( widthL, widthT, centerW, middleH, sliceL, sliceT, imgCenterW, imgMiddleH, 
+                          tileSizeT || tileSizeB || imgCenterW, tileSizeL || tileSizeR || imgMiddleH );
+            }
+            addImage( elW - widthR, widthT, widthR, middleH, imgW - sliceR, sliceT, sliceR, imgMiddleH, widthR, tileSizeR ); // middle right
+            addImage( 0, elH - widthB, widthL, widthB, 0, imgH - sliceB, sliceL, sliceB, widthL, widthB ); // bottom left
+            addImage( widthL, elH - widthB, centerW, widthB, sliceL, imgH - sliceB, imgCenterW, sliceB, tileSizeB, widthB ); // bottom center
+            addImage( elW - widthR, elH - widthB, widthR, widthB, imgW - sliceR, imgH - sliceB, sliceR, sliceB, widthR, widthB ); // bottom right
+
+            svg.push(
+                    '<defs>' +
+                        patterns.join('\n') +
+                    '</defs>' +
+                    rects.join('\n') +
+                '</svg>'
+            );
+
+            me.parent.setBackgroundLayer( me.bgLayerZIndex, 'url(data:image/svg+xml,' + escape( svg.join( '' ) ) + ') no-repeat border-box border-box' );
+
+            // If the border-image's src wasn't immediately available, the SVG for its background layer
+            // will have been created asynchronously after the main element's update has finished; we'll
+            // therefore need to force the root renderer to sync to the final background once finished.
+            if( isAsync ) {
+                me.parent.finishUpdate();
+            }
+        }, me );
+
+        isAsync = 1;
+    },
+
+    /**
+     * Convert a given image to a data URI
+     */
+    imageToDataURI: (function() {
+        var uris = {};
+        return function( src, width, height ) {
+            var uri = uris[ src ],
+                image, canvas;
+            if ( !uri ) {
+                image = new Image();
+                canvas = doc.createElement( 'canvas' );
+                image.src = src;
+                canvas.width = width;
+                canvas.height = height;
+                canvas.getContext( '2d' ).drawImage( image, 0, 0 );
+                uri = uris[ src ] = canvas.toDataURL();
+            }
+            return uri;
+        }
+    })(),
+
+    prepareUpdate: PIE.BorderImageRenderer.prototype.prepareUpdate,
+
+    destroy: function() {
+        var me = this,
+            rs = me.targetElement.runtimeStyle;
+        me.parent.setBackgroundLayer( me.bgLayerZIndex );
+        rs.borderColor = rs.borderStyle = rs.borderWidth = '';
+    }
+
+} );
+
+PIE.Element = (function() {
+
+    var wrappers = {},
+        lazyInitCssProp = PIE.CSS_PREFIX + 'lazy-init',
+        pollCssProp = PIE.CSS_PREFIX + 'poll',
+        trackActiveCssProp = PIE.CSS_PREFIX + 'track-active',
+        trackHoverCssProp = PIE.CSS_PREFIX + 'track-hover',
+        hoverClass = PIE.CLASS_PREFIX + 'hover',
+        activeClass = PIE.CLASS_PREFIX + 'active',
+        focusClass = PIE.CLASS_PREFIX + 'focus',
+        firstChildClass = PIE.CLASS_PREFIX + 'first-child',
+        ignorePropertyNames = { 'background':1, 'bgColor':1, 'display': 1 },
+        classNameRegExes = {},
+        dummyArray = [];
+
+
+    function addClass( el, className ) {
+        el.className += ' ' + className;
+    }
+
+    function removeClass( el, className ) {
+        var re = classNameRegExes[ className ] ||
+            ( classNameRegExes[ className ] = new RegExp( '\\b' + className + '\\b', 'g' ) );
+        el.className = el.className.replace( re, '' );
+    }
+
+    function delayAddClass( el, className /*, className2*/ ) {
+        var classes = dummyArray.slice.call( arguments, 1 ),
+            i = classes.length;
+        setTimeout( function() {
+            if( el ) {
+                while( i-- ) {
+                    addClass( el, classes[ i ] );
+                }
+            }
+        }, 0 );
+    }
+
+    function delayRemoveClass( el, className /*, className2*/ ) {
+        var classes = dummyArray.slice.call( arguments, 1 ),
+            i = classes.length;
+        setTimeout( function() {
+            if( el ) {
+                while( i-- ) {
+                    removeClass( el, classes[ i ] );
+                }
+            }
+        }, 0 );
+    }
+
+
+
+    function Element( el ) {
+        var renderers,
+            rootRenderer,
+            boundsInfo = new PIE.BoundsInfo( el ),
+            styleInfos,
+            styleInfosArr,
+            initializing,
+            initialized,
+            eventsAttached,
+            eventListeners = [],
+            delayed,
+            destroyed,
+            poll;
+
+        /**
+         * Initialize PIE for this element.
+         */
+        function init() {
+            if( !initialized ) {
+                var docEl,
+                    bounds,
+                    ieDocMode = PIE.ieDocMode,
+                    cs = el.currentStyle,
+                    lazy = cs.getAttribute( lazyInitCssProp ) === 'true',
+                    trackActive = cs.getAttribute( trackActiveCssProp ) !== 'false',
+                    trackHover = cs.getAttribute( trackHoverCssProp ) !== 'false',
+                    childRenderers;
+
+                // Polling for size/position changes: default to on in IE8, off otherwise, overridable by -pie-poll
+                poll = cs.getAttribute( pollCssProp );
+                poll = ieDocMode > 7 ? poll !== 'false' : poll === 'true';
+
+                // Force layout so move/resize events will fire. Set this as soon as possible to avoid layout changes
+                // after load, but make sure it only gets called the first time through to avoid recursive calls to init().
+                if( !initializing ) {
+                    initializing = 1;
+                    el.runtimeStyle.zoom = 1;
+                    initFirstChildPseudoClass();
+                }
+
+                boundsInfo.lock();
+
+                // If the -pie-lazy-init:true flag is set, check if the element is outside the viewport and if so, delay initialization
+                if( lazy && ( bounds = boundsInfo.getBounds() ) && ( docEl = doc.documentElement || doc.body ) &&
+                        ( bounds.y > docEl.clientHeight || bounds.x > docEl.clientWidth || bounds.y + bounds.h < 0 || bounds.x + bounds.w < 0 ) ) {
+                    if( !delayed ) {
+                        delayed = 1;
+                        PIE.OnScroll.observe( init );
+                    }
+                } else {
+                    initialized = 1;
+                    delayed = initializing = 0;
+                    PIE.OnScroll.unobserve( init );
+
+                    // Create the style infos and renderers
+                    if ( ieDocMode === 9 ) {
+                        styleInfos = {
+                            backgroundInfo: new PIE.BackgroundStyleInfo( el ),
+                            borderImageInfo: new PIE.BorderImageStyleInfo( el ),
+                            borderInfo: new PIE.BorderStyleInfo( el )
+                        };
+                        styleInfosArr = [
+                            styleInfos.backgroundInfo,
+                            styleInfos.borderImageInfo
+                        ];
+                        rootRenderer = new PIE.IE9RootRenderer( el, boundsInfo, styleInfos );
+                        childRenderers = [
+                            new PIE.IE9BackgroundRenderer( el, boundsInfo, styleInfos, rootRenderer ),
+                            new PIE.IE9BorderImageRenderer( el, boundsInfo, styleInfos, rootRenderer )
+                        ];
+                    } else {
+
+                        styleInfos = {
+                            backgroundInfo: new PIE.BackgroundStyleInfo( el ),
+                            borderInfo: new PIE.BorderStyleInfo( el ),
+                            borderImageInfo: new PIE.BorderImageStyleInfo( el ),
+                            borderRadiusInfo: new PIE.BorderRadiusStyleInfo( el ),
+                            boxShadowInfo: new PIE.BoxShadowStyleInfo( el ),
+                            visibilityInfo: new PIE.VisibilityStyleInfo( el )
+                        };
+                        styleInfosArr = [
+                            styleInfos.backgroundInfo,
+                            styleInfos.borderInfo,
+                            styleInfos.borderImageInfo,
+                            styleInfos.borderRadiusInfo,
+                            styleInfos.boxShadowInfo,
+                            styleInfos.visibilityInfo
+                        ];
+                        rootRenderer = new PIE.RootRenderer( el, boundsInfo, styleInfos );
+                        childRenderers = [
+                            new PIE.BoxShadowOutsetRenderer( el, boundsInfo, styleInfos, rootRenderer ),
+                            new PIE.BackgroundRenderer( el, boundsInfo, styleInfos, rootRenderer ),
+                            //new PIE.BoxShadowInsetRenderer( el, boundsInfo, styleInfos, rootRenderer ),
+                            new PIE.BorderRenderer( el, boundsInfo, styleInfos, rootRenderer ),
+                            new PIE.BorderImageRenderer( el, boundsInfo, styleInfos, rootRenderer )
+                        ];
+                        if( el.tagName === 'IMG' ) {
+                            childRenderers.push( new PIE.ImgRenderer( el, boundsInfo, styleInfos, rootRenderer ) );
+                        }
+                        rootRenderer.childRenderers = childRenderers; // circular reference, can't pass in constructor; TODO is there a cleaner way?
+                    }
+                    renderers = [ rootRenderer ].concat( childRenderers );
+
+                    // Add property change listeners to ancestors if requested
+                    initAncestorEventListeners();
+
+                    // Add to list of polled elements in IE8
+                    if( poll ) {
+                        PIE.Heartbeat.observe( update );
+                        PIE.Heartbeat.run();
+                    }
+
+                    // Trigger rendering
+                    update( 1 );
+                }
+
+                if( !eventsAttached ) {
+                    eventsAttached = 1;
+                    if( ieDocMode < 9 ) {
+                        addListener( el, 'onmove', handleMoveOrResize );
+                    }
+                    addListener( el, 'onresize', handleMoveOrResize );
+                    addListener( el, 'onpropertychange', propChanged );
+                    if( trackHover ) {
+                        addListener( el, 'onmouseenter', mouseEntered );
+                    }
+                    if( trackHover || trackActive ) {
+                        addListener( el, 'onmouseleave', mouseLeft );
+                    }
+                    if( trackActive ) {
+                        addListener( el, 'onmousedown', mousePressed );
+                    }
+                    if( el.tagName in PIE.focusableElements ) {
+                        addListener( el, 'onfocus', focused );
+                        addListener( el, 'onblur', blurred );
+                    }
+                    PIE.OnResize.observe( handleMoveOrResize );
+
+                    PIE.OnUnload.observe( removeEventListeners );
+                }
+
+                boundsInfo.unlock();
+            }
+        }
+
+
+
+
+        /**
+         * Event handler for onmove and onresize events. Invokes update() only if the element's
+         * bounds have previously been calculated, to prevent multiple runs during page load when
+         * the element has no initial CSS3 properties.
+         */
+        function handleMoveOrResize() {
+            if( boundsInfo && boundsInfo.hasBeenQueried() ) {
+                update();
+            }
+        }
+
+
+        /**
+         * Update position and/or size as necessary. Both move and resize events call
+         * this rather than the updatePos/Size functions because sometimes, particularly
+         * during page load, one will fire but the other won't.
+         */
+        function update( force ) {
+            if( !destroyed ) {
+                if( initialized ) {
+                    var i, len = renderers.length;
+
+                    lockAll();
+                    for( i = 0; i < len; i++ ) {
+                        renderers[i].prepareUpdate();
+                    }
+                    if( force || boundsInfo.positionChanged() ) {
+                        /* TODO just using getBoundingClientRect (used internally by BoundsInfo) for detecting
+                           position changes may not always be accurate; it's possible that
+                           an element will actually move relative to its positioning parent, but its position
+                           relative to the viewport will stay the same. Need to come up with a better way to
+                           track movement. The most accurate would be the same logic used in RootRenderer.updatePos()
+                           but that is a more expensive operation since it does some DOM walking, and we want this
+                           check to be as fast as possible. */
+                        for( i = 0; i < len; i++ ) {
+                            renderers[i].updatePos();
+                        }
+                    }
+                    if( force || boundsInfo.sizeChanged() ) {
+                        for( i = 0; i < len; i++ ) {
+                            renderers[i].updateSize();
+                        }
+                    }
+                    rootRenderer.finishUpdate();
+                    unlockAll();
+                }
+                else if( !initializing ) {
+                    init();
+                }
+            }
+        }
+
+        /**
+         * Handle property changes to trigger update when appropriate.
+         */
+        function propChanged() {
+            var i, len = renderers.length,
+                renderer,
+                e = event;
+
+            // Some elements like <table> fire onpropertychange events for old-school background properties
+            // ('background', 'bgColor') when runtimeStyle background properties are changed, which
+            // results in an infinite loop; therefore we filter out those property names. Also, 'display'
+            // is ignored because size calculations don't work correctly immediately when its onpropertychange
+            // event fires, and because it will trigger an onresize event anyway.
+            if( !destroyed && !( e && e.propertyName in ignorePropertyNames ) ) {
+                if( initialized ) {
+                    lockAll();
+                    for( i = 0; i < len; i++ ) {
+                        renderers[i].prepareUpdate();
+                    }
+                    for( i = 0; i < len; i++ ) {
+                        renderer = renderers[i];
+                        // Make sure position is synced if the element hasn't already been rendered.
+                        // TODO this feels sloppy - look into merging propChanged and update functions
+                        if( !renderer.isPositioned ) {
+                            renderer.updatePos();
+                        }
+                        if( renderer.needsUpdate() ) {
+                            renderer.updateProps();
+                        }
+                    }
+                    rootRenderer.finishUpdate();
+                    unlockAll();
+                }
+                else if( !initializing ) {
+                    init();
+                }
+            }
+        }
+
+
+        /**
+         * Handle mouseenter events. Adds a custom class to the element to allow IE6 to add
+         * hover styles to non-link elements, and to trigger a propertychange update.
+         */
+        function mouseEntered() {
+            //must delay this because the mouseenter event fires before the :hover styles are added.
+            delayAddClass( el, hoverClass );
+        }
+
+        /**
+         * Handle mouseleave events
+         */
+        function mouseLeft() {
+            //must delay this because the mouseleave event fires before the :hover styles are removed.
+            delayRemoveClass( el, hoverClass, activeClass );
+        }
+
+        /**
+         * Handle mousedown events. Adds a custom class to the element to allow IE6 to add
+         * active styles to non-link elements, and to trigger a propertychange update.
+         */
+        function mousePressed() {
+            //must delay this because the mousedown event fires before the :active styles are added.
+            delayAddClass( el, activeClass );
+
+            // listen for mouseups on the document; can't just be on the element because the user might
+            // have dragged out of the element while the mouse button was held down
+            PIE.OnMouseup.observe( mouseReleased );
+        }
+
+        /**
+         * Handle mouseup events
+         */
+        function mouseReleased() {
+            //must delay this because the mouseup event fires before the :active styles are removed.
+            delayRemoveClass( el, activeClass );
+
+            PIE.OnMouseup.unobserve( mouseReleased );
+        }
+
+        /**
+         * Handle focus events. Adds a custom class to the element to trigger a propertychange update.
+         */
+        function focused() {
+            //must delay this because the focus event fires before the :focus styles are added.
+            delayAddClass( el, focusClass );
+        }
+
+        /**
+         * Handle blur events
+         */
+        function blurred() {
+            //must delay this because the blur event fires before the :focus styles are removed.
+            delayRemoveClass( el, focusClass );
+        }
+
+
+        /**
+         * Handle property changes on ancestors of the element; see initAncestorEventListeners()
+         * which adds these listeners as requested with the -pie-watch-ancestors CSS property.
+         */
+        function ancestorPropChanged() {
+            var name = event.propertyName;
+            if( name === 'className' || name === 'id' ) {
+                propChanged();
+            }
+        }
+
+        function lockAll() {
+            boundsInfo.lock();
+            for( var i = styleInfosArr.length; i--; ) {
+                styleInfosArr[i].lock();
+            }
+        }
+
+        function unlockAll() {
+            for( var i = styleInfosArr.length; i--; ) {
+                styleInfosArr[i].unlock();
+            }
+            boundsInfo.unlock();
+        }
+
+
+        function addListener( targetEl, type, handler ) {
+            targetEl.attachEvent( type, handler );
+            eventListeners.push( [ targetEl, type, handler ] );
+        }
+
+        /**
+         * Remove all event listeners from the element and any monitored ancestors.
+         */
+        function removeEventListeners() {
+            if (eventsAttached) {
+                var i = eventListeners.length,
+                    listener;
+
+                while( i-- ) {
+                    listener = eventListeners[ i ];
+                    listener[ 0 ].detachEvent( listener[ 1 ], listener[ 2 ] );
+                }
+
+                PIE.OnUnload.unobserve( removeEventListeners );
+                eventsAttached = 0;
+                eventListeners = [];
+            }
+        }
+
+
+        /**
+         * Clean everything up when the behavior is removed from the element, or the element
+         * is manually destroyed.
+         */
+        function destroy() {
+            if( !destroyed ) {
+                var i, len;
+
+                removeEventListeners();
+
+                destroyed = 1;
+
+                // destroy any active renderers
+                if( renderers ) {
+                    for( i = 0, len = renderers.length; i < len; i++ ) {
+                        renderers[i].finalized = 1;
+                        renderers[i].destroy();
+                    }
+                }
+
+                // Remove from list of polled elements in IE8
+                if( poll ) {
+                    PIE.Heartbeat.unobserve( update );
+                }
+                // Stop onresize listening
+                PIE.OnResize.unobserve( update );
+
+                // Kill references
+                renderers = boundsInfo = styleInfos = styleInfosArr = el = null;
+            }
+        }
+
+
+        /**
+         * If requested via the custom -pie-watch-ancestors CSS property, add onpropertychange and
+         * other event listeners to ancestor(s) of the element so we can pick up style changes
+         * based on CSS rules using descendant selectors.
+         */
+        function initAncestorEventListeners() {
+            var watch = el.currentStyle.getAttribute( PIE.CSS_PREFIX + 'watch-ancestors' ),
+                i, a;
+            if( watch ) {
+                watch = parseInt( watch, 10 );
+                i = 0;
+                a = el.parentNode;
+                while( a && ( watch === 'NaN' || i++ < watch ) ) {
+                    addListener( a, 'onpropertychange', ancestorPropChanged );
+                    addListener( a, 'onmouseenter', mouseEntered );
+                    addListener( a, 'onmouseleave', mouseLeft );
+                    addListener( a, 'onmousedown', mousePressed );
+                    if( a.tagName in PIE.focusableElements ) {
+                        addListener( a, 'onfocus', focused );
+                        addListener( a, 'onblur', blurred );
+                    }
+                    a = a.parentNode;
+                }
+            }
+        }
+
+
+        /**
+         * If the target element is a first child, add a pie_first-child class to it. This allows using
+         * the added class as a workaround for the fact that PIE's rendering element breaks the :first-child
+         * pseudo-class selector.
+         */
+        function initFirstChildPseudoClass() {
+            var tmpEl = el,
+                isFirst = 1;
+            while( tmpEl = tmpEl.previousSibling ) {
+                if( tmpEl.nodeType === 1 ) {
+                    isFirst = 0;
+                    break;
+                }
+            }
+            if( isFirst ) {
+                addClass( el, firstChildClass );
+            }
+        }
+
+
+        // These methods are all already bound to this instance so there's no need to wrap them
+        // in a closure to maintain the 'this' scope object when calling them.
+        this.init = init;
+        this.update = update;
+        this.destroy = destroy;
+        this.el = el;
+    }
+
+    Element.getInstance = function( el ) {
+        var id = PIE.Util.getUID( el );
+        return wrappers[ id ] || ( wrappers[ id ] = new Element( el ) );
+    };
+
+    Element.destroy = function( el ) {
+        var id = PIE.Util.getUID( el ),
+            wrapper = wrappers[ id ];
+        if( wrapper ) {
+            wrapper.destroy();
+            delete wrappers[ id ];
+        }
+    };
+
+    Element.destroyAll = function() {
+        var els = [], wrapper;
+        if( wrappers ) {
+            for( var w in wrappers ) {
+                if( wrappers.hasOwnProperty( w ) ) {
+                    wrapper = wrappers[ w ];
+                    els.push( wrapper.el );
+                    wrapper.destroy();
+                }
+            }
+            wrappers = {};
+        }
+        return els;
+    };
+
+    return Element;
+})();
+
+/*
+ * This file exposes the public API for invoking PIE.
+ */
+
+
+/**
+ * @property supportsVML
+ * True if the current IE browser environment has a functioning VML engine. Should be true
+ * in most IEs, but in rare cases may be false. If false, PIE will exit immediately when
+ * attached to an element; this property may be used for debugging or by external scripts
+ * to perform some special action when VML support is absent.
+ * @type {boolean}
+ */
+PIE[ 'supportsVML' ] = PIE.supportsVML;
+
+
+/**
+ * Programatically attach PIE to a single element.
+ * @param {Element} el
+ */
+PIE[ 'attach' ] = function( el ) {
+    if (PIE.ieDocMode < 10 && PIE.supportsVML) {
+        PIE.Element.getInstance( el ).init();
+    }
+};
+
+
+/**
+ * Programatically detach PIE from a single element.
+ * @param {Element} el
+ */
+PIE[ 'detach' ] = function( el ) {
+    PIE.Element.destroy( el );
+};
+
+
+} // if( !PIE )
+})();
\ No newline at end of file