I am trying to make this captcha jquery plugin to work. The a certain line of code is executed, the error pops up.

This is the line of code that causes the error :

$(".ajax-fc-" + rand).draggable({ containment: '#ajax-fc-content' });

What I am assuming is that there is some kind of conflict with the javascript reference, but can't determain what.

These are the referenes that I am using

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.min.js"></script>
<script src="js/ui.core.js"></script>
<script src="js/ui.draggable.js"></script>
<script src="js/ui.droppable.js"></script>
<script src="js/effects.core.js"></script>
<script src="js/effects.slide.js"></script>