<!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>混合布局编程挑战</title>
<style>
body{margin:0;padding:0;}
div{ text-align:center}
.top{ margin:0 auto;width:800px;height:200px; background:#CCC;}
.main{ margin:0 auto;width:800px}
.left{ width:200px; height:800px; float:left; background:#06F}
.right{ width:600px;height:800px; float:right ;background:#0FC}
.r_sub_left{ width:40px; height:800px;float:left; background:#C00}
r_sub_right{ width:560px; height:8oopx;float:right; background:#3FF}
.foot{ margin:0 auto;width:800px; height:100px;clear:both;background:#C60;margin:0 auto }
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">
<div class="left">left</div>
<div class="right">
<div class="r_sub_left">
</div>
<div class=" r_sub_right">right
</div>
</div>
</div>
<div class="foot">foot</div>
</body>
</html>
