function SetAd(strObj,strHTML) { if (!document.getElementById(strObj)) { document.getElementById("C"+strObj).innerHTML=strHTML; } else { document.getElementById("C"+strObj).innerHTML=""; } } //顶部广告 SetAd("Banner","

"); //中间第一条广告 //SetAd("Sad","

"); //中间第二条文选 //SetAd("Sad0","

"); //右边第一条 //SetAd("Srad","

"); //SetAd("Tleft","

"); //会展信息下方广告 //SetAd("Mid","

"); //分类广告 //SetAd("MColumn","

");