accordion widget - no errors, and no accordion.

accordion widget - no errors, and no accordion.


I can't for the life of me see what's wrong with this. In both FF and
IE I get no errors, but no accordion either. I'm pulling in the
relevant JQuery files from the Google Code repository but they seem to
include all the right bits, and apart from that I can't see any
significant ways it differs from the example.
Any suggestions?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://
www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Capsule01 Studio</title>
<style type="text/css">
/*    Accordion    */
#accordion{
    list-style-type:none;
    margin:0;
    padding:0;
}
</style>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/
libs/jquery/1.2.6/jquery.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/
libs/jqueryui/1.5.2/jquery-ui.js"></script>
<script type="text/javascript">
$(document).ready(function() {
    $("#accordion").accordion();
});
</script>
</head>
<body>
<ul id="accordion" class="ui-accordion-container" style="width:
200px;">
    <li>
        <h2><a href='#'>Project Docs</a></h2>
        <div>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed
do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim
ad minim veniam</div>
    </li>
    <li>
        <h2><a href='#'>Information Architecture</a></h2>
        <div>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed
do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim
ad minim veniam</div>
    </li>
    <li>
        <h2><a href='#'>Design</a></h2>
        <div>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed
do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim
ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut
aliquip ex ea commodo consequat. Duis aute irure dolor in
reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
culpa qui officia deserunt mollit anim id est laborum.</div>
    </li>
</ul>
</body>
</html>