JQ N级导航

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
*{ padding:0px; margin:0px;}
ul,li{ list-style:none;}
li{ position:relative; height:30px; line-height:30px; text-align:center;}
a{ text-decoration:none;}
ul.one{100px; background-color:#f4f3f3;border:#ddd 1px solid;}
ul.one ul{ display:none; position:absolute; left:100px; top:0px; 100px;}
</style>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script>
$(function(){

$('ul.one li').each(function(){
$(this).mouseover(function(){
if($(this).has('ul').length>0)
{
$(this).find('>ul').show();
}
else{
$(this).siblings().find('ul').hide();
}
})
})

$('ul.one ul').each(function(){
$(this).mouseout(function(){
$(this).hide();
})
})

})
</script>
</head>

</body>
</html>