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

<style type="text/css">
   .widebott { margin-bottom: 2cm }
-->
</style>
</head>

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

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

<center>

<h5>This example uses calls to an embedded stylesheet to dynamically set an element's bottom margin.</h5>

<p id="msg" onclick="this.className='widebott'" 
   ondblclick="this.className=''">
      Click on me to expand my bottom margin. 
      Double-click on me to restore. 
</p>

</center>

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

</body>
</html>