Problems with my toggle function.

Problems with my toggle function.

I have a function the opens a "ul" when the user clicks on the expandSearch div.  The only problem is that the "click" is being bleeding down to the "li's" as well.  I only want the click function to happen when .expandSearch is clicked not it's child element.  How do I stop the trickle down effect?


$('.expandSearch').click(function() {
                $(this).next().toggle('slow');
                return false;
            });

<li id="unassigned" class="parent">Unassigned
               <ul style="display: block;">
                        <li>child node</li>
                        <li>child node</li>        
               </ul>
</li>