function main_ads(x)

{

	soluong=3;

	d=new Date();
	c=d.getSeconds();
	c=c%soluong+x;

	if(c>=soluong)
	c=c-soluong;

	var ads_0="<script type=text/javascript language=javascript src=http://delivery.adnetwork.vn/247/adclick/ads_em9uZV9NVEkyTURFeE5qazRObDh4TWpRMk1EZzJNall6WHpjeU9GODVNQT09Lmh0bWxVNzI4STdWRTEwMTAxMDc4Mk0zOFc=/\></script\>";
	
	var ads_1="<div id=adnet_content_909\></div\><script type=text/javascript src=http://widget1.adnet.vn/adnet_java.js\></script\><script type=text/javascript\>show_adnet(909)</script\>";
	
	var ads_2="<div id=adnet_content_910\></div\><script type=text/javascript src=http://widget1.adnet.vn/adnet_java.js\></script\><script type=text/javascript\>show_adnet(910)</script\>";
	

	switch (c)
	{

		case 0:{return ads_0;break;}
	
		case 1:{return ads_1;break;}
	
		case 2:{return ads_1;break;}

	}

}