I have the following code:

1. <script src="../js/jquery-ui.js"></script>
2. <link rel="stylesheet" href="../css/jquery-ui.css">
3. <ul id="menu" style="display:none">
     <li id="10"><b>Membership List<b></li>  
   </ul>
4. <script>
5. var menu =  $("#menu").menu();
6. </script>

When the code hits line 5, I get the following error:

Object doesn't support property or method 'menu'