Just add to the HTML code additional <li> elements, for example:
Code:
<div id="invertedtabsline"> </div>
<div id="invertedtabs">
<ul>
<li style="margin-left: 1px"><a href="http://www.dynamicdrive.com" title="Home"><span>Home</span></a></li>
<li><a href="http://www.dynamicdrive.com/new.htm" title="New"><span>New</span></a></li>
<li id="current"><a href="http://www.dynamicdrive.com/revised.htm" title="Revised"><span>Revised</span></a></li>
<li><a href="http://tools.dynamicdrive.com" title="Tools"><span>Tools</span></a></li>
<li><a href="http://www.dynamicdrive.com/forums/" title="DHTML Forums"><span>Forums</span></a></li>
<li><a href="http://www.google.com" title="Google"><span>Google</span></a></li>
</ul>
</div>
<br style="clear: left" />
Bookmarks