<!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=gb2312" />
<title>CSS布局入门，二列右列宽自适应</title>
<style>
body{
margin:0
}
#top{
background-color:blue;
height:100px;
text-align:center
}
#left{
background-color:#cccccc;
border:2px solid #333333;
width:100px;
height:400px;
float:left;
}
#right{
background-color:#cccccc;
border:2px solid #333333;
height:400px;
}
#buttom{
background-color:green;
height:100px;
}
</style>
</head>
<body>
<div id="top">顶部</div>
<div id="left">左列</div>
<div id="right">右列</div>
<div id = "buttom">下面-居中</div>
</body>
</html>