Uncaught ReferenceError: $ is not defined?

tl;dr

To fix the error Uncaught ReferenceError: $ is not defined, you should include the jQuery scripts before any other scripts. To do this, add the following lines of code to your HTML document:

<script language="JavaScript" type="text/javascript" src="/js/jquery-1.2.6.min.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/jquery-ui-personalized-1.5.2.packed.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/sprinkle.js"></script>

This will ensure that the jQuery scripts are loaded before any other scripts, which should fix the error.