JSP实现页面右下角消息弹框

%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
%@page import="java.util.*"%>
html>
 head>
 style type="text/css">
 #winpop { width:250px; height:0px; position:absolute; right:0; bottom:0; border:1px solid grey; margin:0; padding:1px; overflow:hidden; display:none; background:#FFFFFF}
 #winpop .title { width:100%; height:20px; line-height:20px; background:#0AB0FF ; font-weight:bold; text-align:center; font-size:12px;color:white}
 #winpop .con { width:100%; height:360px; line-height:80px; font-weight:bold; font-size:12px; color:#FF0000; text-decoration:underline; text-align:center}
 .close { position:absolute; right:4px; top:-1px; color:#FFFFFF; cursor:pointer}
 /style>
 /head>
% 
 //未读消息unreadList根据实际情况取
 ListMap> unreadList = new ArrayListMap>();
 MapString,String> map1=new HashMapString,String>();
 map1.put("msgId","1");
 map1.put("msgContent","message111111");
 unreadList.add(map1);
 MapString,String> map2=new HashMapString,String>();
 map2.put("msgId","2");
 map2.put("msgContent","message222222");
 unreadList.add(map2);
 int num=unreadList.size();
%>
 body>
 script language="javascript" type="text/javascript">
 window.onload = function tanchuang() { //加载
 document.getElementById('winpop').style.height = '0px';//要初始化这个高度,虽然CSS里已经初始化了
 
 setTimeout("tips_pop()",0); //调用tips_pop()这个函数
 }
 
 function tips_pop() {
 var MsgPop = document.getElementById("winpop");//获取窗口这个对象,即ID为winpop的对象
 var popH = parseInt(MsgPop.style.height);//用parseInt将对象的高度转化为数字,以方便下面比较
 
 if (popH == 0) { //如果窗口的高度是0
 MsgPop.style.display = "block";//那么将隐藏的窗口显示出来
 show = setInterval("changeH('up')", 2);//开始以每0.002秒调用函数changeH("up"),即每0.002秒向上移动一次
 } else { //否则
 hide = setInterval("changeH('down')", 2);//开始以每0.002秒调用函数changeH("down"),即每0.002秒向下移动一次
 }
 }
 function changeH(str) {
 var MsgPop = document.getElementById("winpop");
 var popH = parseInt(MsgPop.style.height);
 if (str == "up") { //如果这个参数是UP
 if (popH = 100) { //如果转化为数值的高度小于等于100
 MsgPop.style.height = (popH + 4).toString() + "px";//高度增加4个象素
 } else {
 clearInterval(show);//否则就取消这个函数调用,意思就是如果高度超过100象度了,就不再增长了
 }
 }
 if (str == "down") {
 if (popH >= 4) { //如果这个参数是down
 MsgPop.style.height = (popH - 4).toString() + "px";//那么窗口的高度减少4个象素
 } else { //否则
 clearInterval(hide); //否则就取消这个函数调用,意思就是如果高度小于4个象度的时候,就不再减了
 MsgPop.style.display = "none"; //因为窗口有边框,所以还是可以看见1~2象素没缩进去,这时候就把DIV隐藏掉
 }
 }
 }
 /script>
 
 %if(num>0){ %>
 div id="winpop">
 div class="title" >系统信息br>
 共有font color="red">big>%=num %>/big>/font>条未读消息
 span class="close" οnclick="tips_pop()">X/span>/div>
 %for(int i=0;inum;i++) { %>
 !-- 点击信息标题链接到信息明细，传递信息编号参数 -->
 a href="/XXXAction.do?msgId=%=unreadList.get(i).get("msgId") %>">
 %if(String.valueOf(unreadList.get(i).get("msgContent")).length()>16) {%>
 %=String.valueOf(unreadList.get(i).get("msgContent")).substring(0,16)+"..." %>
 %} else{ %>
 %=String.valueOf(unreadList.get(i).get("msgContent")) %>
 %} %>
 /a>br>
 %
 if(i>=1){//最多显示两条
 break;
 }
 } %>
 center>
 !-- 点击查看更多未读消息 -->
 a href="/XXXAction.do %>" >font color="red">更多未读消息.../font>/a>/center>
 /div>
 %} %>
 /body>
/html>