Navigation with li and jquery not working

I have the following code:

HTML

<ul id="navigation">
 <li class="quickHelp"><a href="" title="Ayuda Rápida"></a>
     <div>
         Sed lacus. Donec lectus. Nullam pretium nibh ut turpis. Nam bibendum. In nulla tortor, elementum vel, tempor at, varius non, purus. Mauris vitae nisl nec metus placerat consectetuer. Donec ipsum. Proin imperdiet est. Phasellus dapibus semper urna. Pellentesque ornare, orci in consectetuer hendrerit, urna elit eleifend nunc, ut consectetuer nisl felis ac diam. Etiam non felis. Donec ut ante. In id eros. Suspendisse lacus turpis, cursus egestas at sem. Mauris quam enim, molestie in, rhoncus ut, lobortis a, est.
     </div>
 </li>
 </ul>
 

CSS

ul#navigation {
     position: fixed;
     margin: 0px;
     padding: 0px;
     top: 10px;
     left: 0px;
     list-style: none;
     z-index:9999;
 }
 ul#navigation li {
     width: 100px;
 }
 ul#navigation li a {
     display: block;
     margin-left: -2px;
     width: 300px;
     height: 350px;    
     background-color:#CCC;
     background-repeat:no-repeat;
     background-position:center center;
     border:1px solid #AFAFAF;
     -moz-border-radius:0px 10px 10px 0px;
     -webkit-border-bottom-right-radius: 10px;
     -webkit-border-top-right-radius: 10px;
     -khtml-border-bottom-right-radius: 10px;
     -khtml-border-top-right-radius: 10px;
     /*-moz-box-shadow: 0px 4px 3px #000;
     -webkit-box-shadow: 0px 4px 3px #000;    
     opacity: 0.6;*/
     filter:progid:DXImageTransform.Microsoft.Alpha(opacity=60);
 }
 ul#navigation .quickHelp a{
     background-image: url(../Content/images/info/leftBanner.png);
     background-position: right;
 }
 
 ul#navigation div{
     position: absolute;
 }?
 

JS

$('#navigation a').stop().animate({ 'marginLeft': '-275px' }, 1000);
 
 $('#navigation > li').hover(
     function () {
         $('a', $(this)).stop().animate({ 'marginLeft': '-2px' }, 200);
     },
     function () {
         $('a', $(this)).stop().animate({ 'marginLeft': '-275px' }, 200);
     }
 );
 

What I'm trying to achieve is that I want the content of the <div> to be displayed inside the <li> not below...

Here is a live example of it...

Thanks in advance!

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