ie7下li显示不正常，怎么破？

悬赏园豆：10 [已解决问题] 解决于 2015-01-07 09:29

<!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>无标题文档</title>
<style>
li{ list-style:none}
.fenleiul li{ float:left; width:auto; border:solid 1px #FF0000 }
</style>
</head>
<body>
<div style="width:200px;">
<ul class=fenleiul>
<li>首页</li>
<li>精选版块</li>
<li>论坛帮助</li>
<li>论坛牛人</li>
<li>论坛地图</li>
<li>专家问答</li>
</ul></div>
</body>
</html>