【www.gdgbn.com--浏览器】

兼容多浏览左右浮动广告代码
var w3c = (document.getElementById) ? true : false;
var agt = navigator.userAgent.toLowerCase();
var ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1) && (agt.indexOf("omniweb") == -1));
var mymovey = new Number();
function IeTrueBody(){
 return (document.compatMode && document.compatMode!="BackCompat") ? document.documentElement : document.body;
}
function GetScrollTop(){
 return ie ? IeTrueBody().scrollTop : window.pageYOffset;
}
function heartBeat(){
 diffY=GetScrollTop();
 mymovey += Math.floor((diffY-document.getElementById("backr").style.top.replace("px","")+0)*0.1);
 document.getElementById("backr").style.top = mymovey+"px";
}
window.setInterval("heartBeat()",1);
function hidethis(){
 document.getElementById("backr").style.display = "none";
}
document.write("");
document.write("");
document.write("fdsfsfdsfdsfd");
document.write("");

本文来源：http://www.gdgbn.com/bangongshuma/24054/