为什么left的样式一直不显示
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type"content="text/html";charset="UTF-8"/>
<title>三列布局</title>
<style type="text/css">
body{margin:0;padding:0}
.left{width:33.33%；height:500px;float:left;background:blue}
.middle{width:33.33%;height:500px;float:left;background:red}
.right{width:33.33%;height:500px;float:right;background:#ccc}
</style>
</head>
<body>
</head>
<div class="left"></div>
<div class="middle"></div>
<div class="right"></div>
</body>
</html>
