两列固定宽度居中
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
#layout{
margin:0 auto;
width:408px;
}
#left{
background-color: #cccccc;
border:2px solid #333333;
width: 200px;
height: 300px;
float: left;
}
#right{
background-color: #cccccc;
border:2px solid #333333;
width:200px;
height: 300px;
float: left;
}
</style>
</head>
<body>
<div id="layout">
<div id="left">左列</div>
<div id="right">右列</div>
</div>
</body>
</html>