[jQuery] Links not working in collapse tree menu

[jQuery] Links not working in collapse tree menu


I used the collapse tree menu I found on http://24ways.org "A carol
Scripting - Derek Featherstone/Day 21".
You can right mouse click and open the links in a new window - you can
see the link in the status bar.
If i disable the javascript the links work,
You can view my html page:
http://www.csu.edu.au/special/validate/build_kelly/library.html
You will find the tree menu used down the left hand side of the page
starting with + finding information.
Javascript
$(document).ready(function(){
        TWOFOURWAYS.enableTree();
});
var TWOFOURWAYS = new Object();
TWOFOURWAYS.enableTree = function ()
{
        $("#navigation_sub ul.collapseme").removeClass("collapseme");
        $("#navigation_sub ul li a").toggle(function(){
            $(this.parentNode).addClass("expanded");
        }, function() {
            $(this.parentNode).removeClass("expanded");
        });
        return false;
}
// remove the class collapseme after the page loads
$(" #navigation_sub ul ul.collapseme").removeClass("collapseme");
HTML
<div id="navigation_sub">
<ul>
<li><a href="page2.html">Finding Information</a>
    <ul class="collapseme">
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page2.html">Catalogue</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page3.html">Databases</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page4.html">Smartsearch</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page2.html">Reserve</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page3.html">Ebooks</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page4.html">Ejournals</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page2.html">Citation Linker</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page3.html">Google</a></li>
<li><a href="http://www.csu.edu.au/special/validate/build_kelly/
page4.html">Google Scholar</a></li>
    </ul>
</li>
</ul>
</div>





















































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