var lastScrollY=0;//滚动条距顶部位置
var close=true;
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*/}

    percent=.1*(diffY-lastScrollY);
    if(percent>0)percent=Math.ceil(percent);
    else percent=Math.floor(percent);
    document.getElementById("gvLeftAd").style.top=parseInt(document.getElementById("gvLeftAd").style.top)+percent+"px";
    document.getElementById("gvRightAd").style.top=parseInt(document.getElementById("gvRightAd").style.top)+percent+"px";

    lastScrollY=lastScrollY+percent;
}
function closeBanner(){
    close=false;
    document.getElementById("gvLeftAd").style.display	= 'none';
    document.getElementById("gvRightAd").style.display	= 'none';
}
divLeftAd="<DIV id=\"gvLeftAd\" style='left:5px;POSITION:absolute;TOP:50px;text-align:center;'><DIV id=\"gvRightAdClose\" style='right:5px;POSITION:absolute;TOP:20px;text-align:center;'><a href=\"#\" onClick=\"closeBanner()\"><img border=0 src=images/index/close.gif border=0></a></div>"//设置位置
   // +"<a href='/jicengjiuye/list' target='_blank'>"//设置链接
   +"<a href='http://zsjy.zhjnc.edu.cn/jiuye/article/showarticle.php/7511.htm' target='_blank'>"//设置链接
    +"<img border=0 src=images/index/rightAd1.jpg border=0></a><br></div>"//设置图片
divRightAd="<DIV id=\"gvRightAd\" style='right:5px;POSITION:absolute;TOP:50px;text-align:center;'><DIV id=\"gvRightAdClose\" style='left:5px;POSITION:absolute;TOP:20px;text-align:center;'><a href=\"#\" onClick=\"closeBanner()\"><img border=0 src=images/index/close.gif border=0></a></div>"
   +"<a href='http://zsjy.zhjnc.edu.cn/jiuye/article/showarticle.php/7511.htm' target='_blank'>"//设置链接
   +"<img border=0 src=images/index/rightAd1.jpg border=0></a><br></div>"
if(close){
document.write(divLeftAd);
document.write(divRightAd);
}
window.setInterval("heartBeat()",100);//每0.1秒钟执行一次