来个大牛指点下，谢谢
<!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</title>
<style type="text/css">
body{
padding:0;
margin:0;
font-size:30px;
font-weight:bold;
}
.top{
width:100%;
height:50px;
background:#999;
}
.main{
width:100%;
height:300px;
background:#F00;
position:relative;
}
.left{
width:200px;
height:300px;
background:#309;
position:absolute;
top:0;
left:0;
}
.right{
margin-left:210px;
height:300px;
background:#3F0;
position:absolute;
}
.foot{
background:#F0C;
height:100px;
width:100%;
}
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">
<div class="left">left</div>
<div class="right">right</div>
</div>
<div class="foot">foot</div>
</body>
</html>
