I have this menu:
<div id="menu">
<div class="header">Menu Header</div>
<ul>
<li>asdfsadfdsaf</li>
<li>sadfsadf</li>
<li>asdfasdf</li>
<li>asdfsadf</li>
<li>asdfsadf</li>
</ul>
</div>
How can I do, so whenever I click on one of the links inside each LI, a new sub-menu will toggle in "under" the clicked one?