var time = 300;
var h = 0;
function addCount()
{
    if(time>0)
    {
        time--;
        h = h+5;
    }
    else
    {
        return;
    }
    if(h>360) //高度
    {
        return;
    }
    document.getElementById("jisou_ad").style.display ="block";
    document.getElementById("jisou_ad").style.height = h+"px";
    setTimeout("addCount()",30);
}
window.onload = function showAds()
{
   addCount();
   setTimeout("noneAds()",10000); //停留时间自己适当调整
}
var T = 260;
var N = 350; //高度
function noneAds()
{
    if(T>0)
    {
        T--;
        N = N-5;
    }
    else
    {
        return;
    }
    if(N<0)
    {
        document.getElementById("jisou_ad").style.display = "none";
        return;
    }

    document.getElementById("jisou_ad").style.height = N+"px";
    setTimeout("noneAds()",30);
}