Be sure to bring in the source files in the correct order. I.e.,
<script type="text/javascript" src="Tangle.js"></script>
<link rel="stylesheet" href="TangleKit/TangleKit.css" type="text/css">
<script type="text/javascript" src="TangleKit/mootools.js"></script>
<script type="text/javascript" src="TangleKit/sprintf.js"></script>
<script type="text/javascript" src="TangleKit/BVTouchable.js"></script>
<script type="text/javascript" src="TangleKit/TangleKit.js"></script>
Matt