<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title> <!--鼠标放上去显示/隐藏效果  --></title>
  <script type="text/javascript" src="jquery-1.8.3.js">
  
  </script>
  <style type="text/css">
    #div1{
        width: 200px;height: 100px;border: 1px solid #ccc; 
        background-color: yellow; 
        display: none;
    }
  </style>
  </head>
 
  <body>
     <input type="button" value="鼠标放上去显示" οnmοuseοver="div1.style.display='block'" οnmοuseοut="div1.style.display='none'"/>
     <div id="div1">
            为了您的信息安全，请保护好您的。。。。。
     </div>
  </body>
</html>