Marshall - 11:10 pm on Apr 25, 2012 (gmt 0)

I tried: .lb a { text-decoration:none; }

Did that work?. I have to ask about your markup. <div> should not be in an <a> tag. The correct format is
<div>
<ul><a href="index.htm" class="lb"></ul>
</div>

Then your CSS is
simply a.lb {text-decoration: none;}
or eliminate the class and simply write
ul a {text-decoration: none;}

So I have to ask, what is the reason for the way you formatted it? Are you looking for a block display with the link?

Marshall