Hi,
The problem seems to be that jQuery is not properly included on your page. So just replace the following:
<script type="text/javascript" src="jquery-loader.js"></script>
with something like:
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
(or you could, of course, use a local copy of jQuery hosted on your server).
The loader script is just used on the demo page to allow easy testing with different jQuery versions.
Cheers!
