Så er det måske dette:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"
http://www.w3.org/TR/html4/loose.dtd"><html>
<head>
<title>Tomt dokument</title>
<meta name="keywords" content="roenving,
http://www.eksperten.dk/spm/499191"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
html,body{height:100%;margin:0px;padding:0px;text-align:center;background:#666;border:0px;}
#container{position:relative;height:100%;margin:0px auto;width:574px;background:#eee;text-align:left;overflow:hidden;}
#container1{position:relative;height:100%;margin:0px;width:287px;background:#e76;text-align:left;overflow:hidden;float:left;}
#container2{position:relative;height:100%;margin:0px;width:287px;background:#7e6;text-align:left;overflow:hidden;float:left;}
#top{position:absolute;left:0px;width:100%;background:#00a;height:120px;text-align:center;z-index:1;color:#a5a;font-weight:900;}
.spacer{background:#00a;height:120px;width:840px;}
</style>
<script language="javascript" type="text/javascript">
</script>
</head>
<body>
<div id="top">Dit topbanner o.l.</div>
<div id="container">
<div id="container1">
<div class="spacer">Dette er usynligt</div>
<!-- hele din side -->
<table style="width:574px;background:yellow;">
<tr>
<td>celle</td>
</tr>
</table>
</div>
<div id="container2">
<div class="spacer">Dette er usynligt</div>
<!-- hele din side -->
<table style="width:574px;background:yellow;">
<tr>
<td>celle</td>
</tr>
</table>
</div>
</div>
</body>
</html>
-- og velbekomme !-)
