Write a program to show a dropdown with Javascript ?

<script type="text/javascript">

 $(document).ready(function ()

 {  

   $(".menuDrop").dropdown(); 

     });

 </script> 

<div class="dropdown">

     <a href="#" class="btn btn-primary menuDrop">Menu<b class="caret"></b></a>

     <ul class="dropdown-menu">

         <li><a href="#">Option1</a></li>

         <li><a href="#">Option2</a></li>

         <li class="divider"></li>

         <li><a href="#">Settings</a></li>

     </ul>

 </div>