<!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>一列布局</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px}
div{ text-align:center; font-weight:bold}
.main,.footer{ width:960px; margin:0 auto}
.head{ width:100%; height:100px; background:#ccc}
.main{ height:600px; background:#FCC;margin 0 auto}
.sub_l{width:200px;height:600px;background:#63F;float:left;margin-top:-600px}
.left{width:190px;height:600px;background:#F99;float:left;margin-top:-600px}
.sub_r{width:200px;height:600px;background:#FC3;float:right;margin-top:-600px}
.right{width:190px;height:600px;background:#6F9;float:right;margin-top:-600px}
.footer{ height:50px; background:#9CF;margin 0 auto}
</style>
</head>
<body>
<div class="head">head</div>
<div class="main">main</div>
<div class="sub_l">sub_l</div>
<div class="sub_r">sub_r</div>
<div class="left">left</div>
<div class="right">right</div>
<div class="footer">footer</div>
</body>
</html>
哪里出错了？
依韵S1