var time = 500;
var h = 0;
var T = 323;
var N = 323; //高度
function addCount()
{
    if(time>0)
    {
        time--;
        //h = h+5;
        h = h+323;
    }
    else
    {
        return;
    }
    if(h>323)  //高度
    {
        return;
    }
    document.getElementById("banner_ad").style.display = "";
    document.getElementById("banner_ad").style.height = h+"px";
    setTimeout("addCount()",50); 
}
//window.onload = function showAds()
function showAds()
{
    addCount();
    setTimeout("noneAds()",5500); //停留时间自己适当调整
//    setTimeout("noneAds()",4000); //停留时间自己适当调整
}
function noneAds()
{
    if(T>0)
    {
        T--;
        //N = N-5;
        N = N-323;
    }
    else
    {
        return;
    }
    if(N<0)
    {
        document.getElementById("banner_ad").style.display = "none";
        return;
    }
    
    document.getElementById("banner_ad").style.height = N+"px";
    setTimeout("noneAds()",30); 
}
document.write("<div class=\"forcenter\">\n")
document.write("<div id=\"banner_ad\" style=\"display:none;height:0px;overflow:hidden;\">\n")
document.write("<a href='http://www.laozhanqiao.com' target='_blank'><img src='http://www.laozhanqiao.com/images/gw.jpg' border='0' width='970' height='172' alt='广为网络科技有限公司'></a>");
document.write("</div>\n")
document.write("</div>\n")
//showAds();