<!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=utf-8" />
<title>無標題文檔</title>
<style type="text/css">
*{ margin:0; padding:0;}
a img{ border:0;}
</style>
</head>
<body>
<div style="height:2000px; background:#ccc; display:none;">
</div>
<!--div id="floatAd" style=" position:fixed !important; position:absolute; _top:expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight-this.offsetHeight)); z-index: 2147483647; left: 50%; margin-left: -240px !important; top: 50%; margin-top: -210px !important; background:url(images/onlineSay.jpg) no-repeat; width:487px; height:350px; cursor:pointer;">
<div onclick="closeFAd();" style=" width:26px; height:26px; float:right;"></div>
<div style="width:487px; height:320px; float:right;" onclick="open_online();"></div>
</div>
<div id="floatSide" style=" width:141px; height:579px; position:fixed !important; position:absolute; _top:expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight-this.offsetHeight)); z-index: 99999; right:0; top:6%; background:url(images/onlineTel.gif);cursor:pointer;" onclick="open_online();></div-->
</body>
</html>
<script type="text/javascript" src="online.js"></script>

JS部分：

// JavaScript Document
//浮動廣告圖片
var floatAdImg = "images/onlineSay.jpg";
//浮動側欄圖片
var floatSideImg = "images/onlineTel.gif";
//打開在線溝通
function open_online()
{
 window.open('http://p.qiao.baidu.com//im/index?siteid=7342332&ucid=7601325');
}
//浮動廣告
document.writeln("<div id=\"floatAd\" style=\" position:fixed !important; position:absolute; _top:expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight-this.offsetHeight)); z-index: 2147483647; left: 50%; margin-left: -240px !important; top: 50%; margin-top: -210px !important; background:url("+floatAdImg+") no-repeat; width:487px; height:350px; cursor:pointer; display:none; \">");
document.writeln("<div onclick=\"closeFAd();\" style=\" width:26px; height:26px; float:right;\"></div>");
document.writeln("<div style=\"width:487px; height:320px; float:right;\" onclick=\"open_online();\"></div>");
document.writeln("</div>");
//浮動側欄
document.writeln("<div style=\" width:141px; height:579px; position:fixed !important; position:absolute; _top:expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight-this.offsetHeight)); z-index: 99999; right:0; top:6%; background:url("+floatSideImg+");cursor:pointer;\" onclick=\"open_online();\"></div>");
//關閉浮動廣告
function closeFAd()
{
 document.getElementById('floatAd').style.display = 'none';
}
//打開浮動廣告
function showFAd()
{
 document.getElementById('floatAd').style.display = 'block';
}
//打開浮動窗口
function showFloat()
{
 document.getElementById('floatAd').style.display = 'block';
}
//打開窗口 20 秒僅執(zhí)行一次
setTimeout(showFAd,20000);
//每個 30 秒執(zhí)行一次
setInterval(showFloat,30000);

效果圖如下：