Something

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">


<html>

<style>


body
{
	font-size: 20pt;
	color: white;
}


#left
{
	width: 160px;
	background: green;
	top: 0px;
	left: 0px;
	float: left;
}

#content
{
	background: brown;
	position: relative;
	margin-left: 160px;
	margin-right: 160px;
	top: 0px;
	left: 0px;
}

#right
{
	width: 160px;
	background: green;
	clear: none;
	position: relative;
	top: 0px;
	right: 0px;
}

</style>


<div id="left">left</div>
<div id="content">content</div>
<div id="right">right</div>

</html>