// JavaScript Document
var time = 500;
var h = 500;
function addCount()
{
    if(time>0)
    {
       time--;
       h = h+5;
    }
    else
    {
       return;
    }
    if(h>564)  //高度
    {
       return;
    }
    document.getElementById("ads").style.display = "";
    document.getElementById("ads").style.height = h+"px";
    setTimeout("addCount()",30); 
}
window.onload = function showAds()
{
     addCount();
     setTimeout("noneAds()",3500); //停留时间自己适当调整
}
var T = 500;
var N = 564; //高度
function noneAds()
{
    if(T>0)
    {
       T--;
       N = N-5;
    }
    else
    {
       return;
    }
    if(N<0)
    {
       document.getElementById("ads").style.display = "none";
       return;
    }
    document.getElementById("ads").style.height = N+"px";
    setTimeout("noneAds()",30); 
}