var site_url = "http://cn.chinaontv.com/";
var site_system = "system";

function play_ad(playsn, nextsec, group_id, ad_id){
	var ads =playsn.split(",");
	if(!ad_id) ad_id=ads[0];
	//ad_counter(ad_id, view_id);	//广告计时
	//var us = Array("http://www.163.com", "http://www.baidu.com", "http://www.google.com");
	//document.getElementById("adgroup_1").src = "http://cn.chinaontv.com/script/ad.html";
	document.getElementById("adgroup_"+group_id).src = site_url+site_system+"/index.php?C=ad&M=validview&adid="+ad_id;

	//找到下一个ID
	if(ads.length>1 && nextsec>0){

		for(var i=0;i<ads.length;i++)
			if(ads[i]==ad_id) nid = (ads[i+1])?ads[i+1]:ads[0];
	
		setTimeout("play_ad('"+playsn+"', "+nextsec+", "+group_id+", "+nid+")", nextsec*1000);
	}	
}