#body, html {height:100%;}?

So I’m laying out this page that has 3 divs. The bottom div is the only one with a specified height of 100%, but for some reason, it stretches more than 100% in all browsers. When I view the page in a browser, I have a vertical scroll bar, but all I want the bottom div to do is stretch downward to fill up the rest of the page. Here is my code:


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Syndicate Interactive - Integrated Interactive Marketing Solutions</title>
<style type="text/css">
body, html {height:100%; width:100%; margin:0px 0px 0px 0px;}
#top {height:20px; background-repeat:repeat-x; width:100%; max-width:1280px; background-image:url(images/bkgrnd.gif);}
#middle {height:580px; background-repeat:no-repeat; background-image:url(images/sky.jpg); width:100%; max-width:1280px;}
#bottom {height:100%; width:100%; max-width:1280px; background-repeat:repeat-x; background-color:#557fb1; background-image:url(images/bkgrnd.gif);}
</style>
</head>
<body>
<div id="top"></div>
<div id="middle"></div>
<div id="bottom"></div>
</body>
</html>