I've been working on this for the past 2 days and I cannot get sortable to return the list order, I'm probably doing some really silly, can someone help me please.

Here is the code.

   

    
 <style type="text/css">
 #available, #selected { list-style-type: none; margin: 0; padding: 0; float: left; margin-right: 10px; background: #eee; padding: 5px; width: 143px;}
 #sortable1 li, #sortable2 li, #sortable3 li { margin: 5px; padding: 5px; font-size: 1.2em; width: 120px; }
 </style>


<script type="text/javascript">
 var order = 0;
 $(function() {
 $("#available, #selected").sortable({
 connectWith: '.connectedSortable',
 dropOnEmpty: true,
 update: function (event,ui) {
 var order = $("#selected").sortable('serialize',{key:'string'});
 alert(order);

 }

 }).disableSelection();
 });
 </script>

<div class="stacks">

<ul id="available" class="connectedSortable">
 <li class="ui-state-default">Item 1</li>
 <li class="ui-state-default">Item 2</li>
 <li class="ui-state-default">Item 3</li>
 <li class="ui-state-default">Item 4</li>
 <li class="ui-state-default">Item 5</li>
</ul>

<ul id="selected" class="connectedSortable">
 <li class="ui-state-default">Item 1</li>
</ul>
</div>






































   

Thanks in advance.