右下角弹出窗口效果代码

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>右下角弹出框</title>
</head>
<style type="text/css">
#rbbox{position:absolute;right:0;bottom:0;width:300px;height:0px;overflow:hidden}
.button{display:inline;float:right;font-size:12px;cursor:pointer}
</style>
<body><div id="rbbox"><a class="button" onclick="closeBox()">关闭</a><iframe src="http://www.kanshule.com" frameborder="0" height="200" width="300" scrolling="no"></iframe></div>
</body>
</html>
<script language="javascript" type="text/javascript">
window.onload=function(){showBox();setTimeout("closeBox()",5000)}
function showBox(o){
if (o==undefined) o=document.getElementById("rbbox");
o.style.height=o.clientHeight+2+"px";
if (o.clientHeight<200) setTimeout(function(){showBox(o)},5);
}
function closeBox(){document.getElementById("rbbox").style.display="none";}
</script>


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