自己做项目，不是完整框架的时候经常会遇到，弹出公告的问题。定位，按钮麻烦一大堆。现在记录一下一个成型的，以作分享。拿走即可用！
<!DOCTYPE html>
<html>
<head>
<meta charset="utf8">
<title>网页右下角的信息框</title>
</head>
<style type="text/css">
#winpop {
width:300px;
height:0px;
position:absolute;
right:0;
bottom:0;
border:1px solid #666;
margin:0;
padding:1px;
overflow:hidden;
display:none;
}
#winpop .title{
width:100%;
height:22px;
line-height:20px;
background:#FFCC00;
font-weight:bold;
text-align:center;
font-size:12px;
}
#winpop .con{
width:100%;
height:200px;
line-height:80px;
font-weight:bold;
font-size:12px;
color:#FF0000;
text-decoration:underline;
text-align:center
}
#silu{
font-size:12px;
color:#666;
position:absolute;
right:0;
text-decoration:underline;
line-height:22px;
}
.close{
position:absolute;
right:4px;
top:-1px;
color:#FFF;
cursor:pointer
}
</style>
<script type="text/javascript">
function tips_pop(){
var MsgPop=document.getElementById("winpop");
var popH=parseInt(MsgPop.style.height);//将对象的高度转化为数字
if(popH==0){
MsgPop.style.display="block";//显示隐藏的窗口
show=setInterval("changeH('up')",2);
}
else{
hide=setInterval("changeH('down')",2);
}
}
function changeH(str){
var MsgPop=document.getElementById("winpop");
var popH=parseInt(MsgPop.style.height);
if(str=="up"){
if(popH<=200){
MsgPop.style.height=(popH+4).toString()+"px";
}
else{
clearInterval(show);
}
}
if(str=="down"){
if(popH>=4){
MsgPop.style.height=(popH-4).toString()+"px";
}
else{
clearInterval(hide);
MsgPop.style.display="none"; //隐藏DIV
}
}
}
window.onload=function(){
var oclose=document.getElementById("close");
var bt=document.getElementById("bt");
document.getElementById('winpop').style.height='0px';
setTimeout("tips_pop()",3000);
oclose.onclick=function(){tips_pop()}
bt.onclick=function(){tips_pop()}
}
</script>
<body>
<div id="silu">
<button id="bt">3秒后会在右下角自动弹出窗口，如果没有弹出请点击这个按钮</button>
</div>
<div id="winpop">
<div class="title">您有新的短消息！<span class="close" id="close">X</span></div>
<div class="con">1条未读信息(</div>
</div>
</body>
</html>
