border-width.aspx font size:
View Sample
<html>
<head>
<title>Abakada CSS Demo: border-width Attribute</title>
<link rel="stylesheet" href="/shared/netdemos.css">

<style type="text/css">
<!--
   td { border-width: 3mm; border-style: groove }
   .thick { border-width: 6mm }
-->
</style>
</head>

<body>
<!-- #include virtual="~/shared/top.inc" -->

<div class="header"><h2>Abakada CSS Demo: border-width Attribute</h2></div>
<hr size=1 width=92%>

<center>

<h5>This example uses calls to an embedded stylesheet to dynamically set the width of an element's border.</h5>

<p id="msg">Move the mouse over the image to apply a style class that expands its border width. 
   Move the mouse out to reset. </p>

<table cellpadding=0 cellspacing=0>
<tr>
   <td onmouseover="this.className='thick'" onmouseout="this.className=''">
      <img src="../shared/images/earth.gif" 
         height=100 width=100 border=0 alt="Mother">
   </td>
</tr>
</table>

</center>

<hr size=1 width=92%>
<!-- #include virtual="~/shared/viewsrc.inc" -->

</body>
</html>