Here is a working example
HTML
<div id="leftWrap">
<div id='accordion'>
<ul>
<li><div>Absorption</div>
<ul style="display: none;">
<li>Accessories</a>
<ul style="display: none;">
<li>AA500AFG</li>
<li>AA500F</li>
<li>AA500G</li>
<li>AA990F</li>
</ul>
</li>
<li>Consumables</li>
<li>Products</li>
</ul>
</li>
<li><div>Fluorescence</div>
<ul style="display: none;">
<li>Accessories</li>
<li>Consumables</li>
<li>Products</li>
</ul>
</li>
</ul>
</div>
</div>
Javascript/JQuery
jQuery(document).ready(function() {
$('#accordion ul > li').hover(function() {
$(this).children("ul").slideToggle('slow');
});
});
If you ask me, it gets really messy when you use mousehover/mouseenter for such things. I'd prefer using a click event after the first hover or something, this way the user won't get annoyed by all that movement.
jQuery(document).ready(function() {
$('#accordion ul:first-child > li').hover(function() {
$(this).children("ul").slideToggle('slow');
});
$('#accordion ul:not(:first-child) > li').click(function(){
$(this).children("ul").slideToggle('slow');
});
});