function TopAd()
{
    var strTopAd="";
    //var topSmallBanner="<div><a href=\"http://www.zxip.com/2010ad/lexus/\" target=_blank><img src=\"adimg/top_090901_s.gif\" /></a></div>";
        strTopAd="<div id=adimage style=\"width:980px;text-align:center;margin:0 auto;\">"+
                    "<div id=adBig><a href=\"http://www.sm-image.cn/?p=20&a=view&r=60\" " + 
                    "target=_blank><img "+
                    "src=\"/upload/ad.jpg\" " +
                    "border=0></A></div>"+
                    "<div id=adSmall style=\"display: none\">";

		//strTopAd+=  topSmallBanner;  
        strTopAd+=  "</div></div>";
		return strTopAd;
}
document.write(TopAd());
$(function(){
    setTimeout("topadimg();",6000);
});
function topadimg()
{
   // $("#adBig").slideUp(1000,function(){$("#adSmall").slideDown(1000);});//最后不消失,留下一个小条
    $("#adBig").slideUp(800);//最后消失不见
}