You got to use CSS.
CSS can be invoked in two ways:
1. Using the STYLE attribute on basically any tag
2. Using the STYLE tag inbetween the HEAD tags
So to remove a link underline you would do this:
<HEAD>
<STYLE TYPE="text/css">
<!--
a { text-decoration: none }
-->
</STYLE>
</HEAD>
This will remove the underline from all links. You can also do this link by
link:
<A HREF="page.html" STYLE="a { text-decoration: none }">
That will only remove the underline for that specific tag. Many other things can be done with CSS and you ought to look into it. Webmonkey has a good article here:
http://www.hotwired.com/webmonkey/98/15/index0a.html?tw=stylesheets