<%
String username = (String) session.getAttribute("sUser")
if(username!=null)//如果这个不等于空,那么证明已经登录
{
MessageBiz bmb = new MessageBizImpl()
List<Message>list = bmb.findMessages(username)
request.setAttribute("msgs", list)
}else
{
%>
<script type="text/javascript">alert("请先登陆")window.location="../login.jsp" </script>
<%
//如果session 为空那么证明没有登录将跳到login.jsp
}
%>
鼠标点击事件就是当鼠标点击元素时,就会出现另一个窗口。首页中右上角的登录这个按钮,当鼠标点击登录时,就会出现登录窗口。
如果直接用javascript来修改css效果的话会非常麻烦,可以用click方法来实现鼠标点击事件。
用摸态框(以下示例代码来自:菜鸟教程)。<!DOCTYPE html>
<html>
<head>
<title>Foundation 实例</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://cdn.static.runoob.com/libs/foundation/5.5.3/css/foundation.min.css">
<script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdn.static.runoob.com/libs/foundation/5.5.3/js/foundation.min.js"></script>
<script src="http://cdn.static.runoob.com/libs/foundation/5.5.3/js/vendor/modernizr.js"></script>
</head>
<body style="padding:20px">
<div style="padding:20px">
<h2>模态框</h2>
<p>模态框是一个显示在页面头部的弹窗。</p>
<button type="button" class="button" data-reveal-id="myModal">点我打开模态框</button>
<div id="myModal" class="reveal-modal" data-reveal>
<h2>Heading in Modal.</h2>
<p>Some text in the modal.</p>
<p>Some text in the modal.</p>
<a class="close-reveal-modal">×</a>
</div>
</div>
<script>
$(document).ready(function() {
$(document).foundation()
})
</script>
</body>
</html>