JSP实现页面右下角消息弹框

JSP页面上通过JS实现消息弹出框，样式可根据要求修改，这边只是一个简单的示范例子，自定义了两条消息，弹框效果如下

JSP页面

%@ 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(num0){ %
 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.domsgId=%=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")) %
 %} %
 /abr
 %
 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