jQuery鼠标悬停显示提示信息窗口

<!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>
<title>鼠标悬停显示提示信息窗口</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<style type="text/css">
.contact{width:100px;height:15px;margin:20px 0 0 50px;background-color:#CCCCCC;text-align:center;}
.us{display:none;width:300px;height:40px;padding:10px;position:relative;top:0px;left:50px;background-color:#0099FF;}
</style>
<script src="http://www.codefans.net/ajaxjs/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
 $(".contact").mouseover(function(){
  $(".us").show("slow");
  $(".contact").mouseout(function(){
   $(".us").hide("slow");
  });
 });
})
</script>
</head>
<body>
<div class="contact">联系我们</div>
<div class="us">显示内容<br>

显示内容描述</div>
</body>
</html>