div左右排版
<!doctype html public "-//w3c//dtd html 4.01//en" "http://www.w3.org/tr/html4/strict.dtd">
<html>
<head>
<title>左右布局－左边定宽，右边不定宽；右在上，左在下</title>
<link rel="stylesheet" type="text/css" href="layout3.css" />
<style>
/* reset */
*,body{margin:0;padding:0;}
/* commons */
body{font-size:13px;}
.clearfix{zoom:1;}
.clearfix:after{content:′.′;display:block;visibility:none;height:0;clear:both;}
#bd{background-color:#DDD;min-height:50px;_height:50px;}
#bd .right{background-color:red;float:right;width:100%;margin-left:-25em;}
#bd .right .content{margin-left:270px;background-color:blue;color:#FFF;}
#bd .left{background-color:green;color:#FFF;width:260px;float:left;}
</style>
</head>
<body>
<div id="hd"><p>上</p></div>
<div id="bd" class="clearfix">
<div class="right">
<div class="content">
<p>右我在右边</p>
<p>右我在右边</p>
<p>右我在右边</p>
<p>右我在右边</p>
</div>
</div>
<div class="left">
<p>我在左边</p>
</div>
</div>
<div id="ft"><p>下</p></div>
</body>
</html>
