为什么TOP的样式不显示。
<!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=utf-8" />
<title>一列布局</title>
<style type="text/css">
body<padding:0;margin:0;>
.top{background-color:#CCC;height:100px;width:100%;}
.main{background-color:#F69;height:800px;width:0 auto;}
.footer{background-color:#9F6;height:50px;width:0 auto;}
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">main</div>
<div class="footer">foorter</div>
</body>
</html>
