<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
	<style type="text/css">
	    body {
	        background: red;
	    }
        div {
            background: green;
            width: 100px;
			position: absolute;
			top: 0;	
			bottom: 0;
			left: 0;
			right: 0;
        }
	</style>
</head>
<body>
<div></div>
</body>
</html>