Your page has:
<script type="text/Javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
but it is loaded through https:// so the jquery script can't load. You would have to use:
<script type="text/Javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>