{% macro load_css(filename) -%}
<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='css/' + filename + '.css')}}">
{% endmacro -%}
{% macro load_js(filename) -%}
<script type="text/javascript" language="javascript" src="{{ url_for('static', filename='js/' + filename +'.js' )}}"></script>
{% endmacro -%}