窗口两边随滚动条下移图片的代码是什么

你说的是浮动广告

下面是文件代码：
// Flash_right.js

var adSrc2 = "images/my.swf" //图片地址
var adUrl2 = "http://www.baidu.com" //链接网址
var adWidth2 = "75"
var adHeight2 = "75"

var weny2 = 10
var wenx2 = 3
var imgheight
document.ns = navigator.appName == "Netscape"
window.screen.width>800 ? imgheight=300:imgheight=120
function myload()
{
if (navigator.appName == "Netscape")
{document.getElementById("dangdang").pageY=pageYOffset+window.innerHeight-imgheight;
document.getElementById("dangdang").pageX=+window.innerWidth-110;
mymove();
}
else
{
document.getElementById("dangdang").style.top=document.body.scrollTop+document.body.offsetHeight-imgheight;
document.getElementById("dangdang").