var adCode=true;
var adWidth;
var adCode;
var adSize;
var skyAd="pos=skyR;sz=120x600";
var boxAd="pos=box;sz=300x250";
var bannerAd="pos=banTop;sz=468x60";

var axel = Math.random()+"";
var rand = (axel * 10000)+"";
var dotat=rand.indexOf(".");
var adNum=rand.substring(0,dotat);

if (adNum<=0){
		adCode=false;
		adWidth="468";
		adType=bannerAd;
	} else if (adNum>=501){
		adWidth="300";
		adType=boxAd;
	} else {
		adWidth="120";
		adType=skyAd;
}