这个三列布局是竖着的!为什么啊
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">>
<title>二列布局</title>
<style type="text/css">
body{margin: 0;padding: 0}
.left{width: 33.33%;height: 500px;float: left;background: #ccc;}
.middle{width: 33.33%;height: 500;float: left;background: #999;}
.right{width: 33.33%;height: 500px;float;rightbackground: pink;}
</style>>
</head>
<body>
<div class="left"></div>
<div class="middle"></div>>
<div class="right"></div>>
</body>
</html>