求大神啊鼠标点符号击DIV层在IE6显示不出来啊

求大神啊,鼠标点击DIV层在IE6显示不出来啊!
看源代码


<!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">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<title>访问页面不存在</title>
<style>
*{margin:0;padding:0;}
.nav{ width:200px; margin:0 auto; background:#fff;}
.nav ul{ width:200px;}
.nav li{ position:relative; width:200px;color:#fff; line-height:22px; background:#333; overflow:hidden; display:block;}
.nav li a{ color:#FFF;}
.nav li div{ display:none;}
.nav li:hover div{ display:block;position:relative;top:0;left:0; margin-top:0px;z-index:99;background:#903;color:#000;width:200px;}
</style>
</head>
<body>
  

</div>
  <div class="nav">
  <ul>
  <li><a href="#">219823987921982398792198239879</a>
  <div>wqwqww<br />
  111111<br />
  111111
  </div>
  </li>
  </ul>
  </div>
</body>
</html>


------解决方案--------------------
楼主 ie上 就a标签支持:hover类,要兼容得用js来做
HTML code

<!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">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<title>访问页面不存在</title>
<style>
*{margin:0;padding:0;}
.nav{ width:200px; margin:0 auto; background:#fff;}
.nav ul{ width:200px;}
.nav li{ position:relative; width:200px;color:#fff; line-height:22px; background:#333; overflow:hidden; display:block;}
.nav li a{ color:#FFF;}
.nav li div{ display:none;}
.nav li .cur { display:block;position:relative;top:0;left:0; margin-top:0px;z-index:99;background:#903;color:#000;width:200px;}
</style>
</head>
<body>
   

</div>
  <div class="nav">
  <ul>
  <li><a href="#">219823987921982398792198239879</a>
  <div>wqwqww<br />
  111111<br />
  111111
  </div>
  </li>
  </ul>
  </div>
  <script>
        function $t(name, cot){
            cot = cot || document;
            return cot.getElementsByTagName(name);
        }
        var lis = $t('li');
        for(var i=0,len = lis.length; i<len; i++){
            lis[i].onmouseover = function(){
                $t('div',this)[0].className = 'cur';
            }
            lis[i].onmouseout = function(){
                $t('div',this)[0].className = '';
            }            
        }
  </script>
</body>
</html>