lastScrollY = 0;
function heartBeat(){
var diffY;
if (document.documentElement && document.documentElement.scrollTop)
diffY = document.documentElement.scrollTop;
else if (document.body)
diffY = document.body.scrollTop
else
{/*Netscape stuff*/}
//alert(diffY);
percent=.1*(diffY-lastScrollY);
if(percent>0)percent=Math.ceil(percent);
else percent=Math.floor(percent);
document.getElementById("centerDiv").style.top = parseInt(document.getElementById("centerDiv").style.top)+percent+"px";
lastScrollY=lastScrollY+percent;
//alert(lastScrollY);
}
//下面这段删除后，对联将不跟随屏幕而移动。
window.setInterval("heartBeat()",1);
//-->
//关闭按钮
function close_centerDiv(){
    centerDiv.style.visibility='hidden';
}
//显示样式
   document.writeln("<style type=\"text\/css\">");
document.writeln("#centerDiv{width:355px;height:255px;background-color:#fff;position:absolute;BORDER-RIGHT: #728eb8 1px solid; BORDER-TOP: #728eb8 1px solid;BORDER-LEFT: #728eb8 1px solid;BORDER-BOTTOM: #728eb8 1px solid;}");
document.writeln(".itemFloat{width:351px;height:250px;line-height:20px;padding-top:2px}");
document.writeln("<\/style>");
//以下为主要内容
document.writeln("<div id=\"centerDiv\" style=\"top:180px;left:205px;display:none\">");

document.writeln("<div id=\"center\" class=\"itemFloat\">");
document.writeln("<a id='yes_ad' target=_blank href=http://www.yes.com.cn/><img border=0 src=http://static.zwsky.com/common/ad/images/yesLogo.jpg></a>");
document.writeln("<a href=\"javascript:close_centerDiv();\" title=\"关闭上面的广告\">关闭<\/a>");
document.writeln("<\/div>");
document.writeln("<\/div>");
var url = "http://" + document.domain + "/servlet/proxy?url=http://www.zwsky.com/iptocountry.do"
$.getJSON(url,
      function(data){
       if(data.country!="CN"){
		   $("#yes_ad").attr("href", "http://www.yes.com.cn/letter/index.jsp");
		   $("#centerDiv").css("display","block"); 
       }else{
		   $("#yes_ad").attr("href", "http://cn.yes.com.cn/letter/index.jsp");
           $("#centerDiv").css("display","block"); 
       }
     }
   );