click event for menus in unordered list

Hi,
I am using buttons created using stylesheet.
All below in BOLD appears as buttons when used with stylesheet. Can i use OnClick event for them?

 
    <div class="animatedtabs">
<ul>
<li><a href="" title="Home"><span>Home</span></a></li>

<li><a href="" title="CSS Examples"><span>CSS</span></a></li>
<li><a href="" title="New"><span>New</span></a></li>
<li><a href="" title="Revised"><span>Revised</span></a></li>
<li><a href="" title="Tools"><span>Tools</span></a></li>   
<li><a href="" title="DHTML Forums"><span>F ...