var adNumber = Math.random() * 1000000000000000000;
var adZone;
try {
	adZone = dartZone;	//let the page override the zone
} catch (e) {
	adZone = 'Index';	//dart zone wasn't defined
}
var used_tiles = 0;

function setDartZone(DartZoneIN)
{
	adZone = DartZoneIN;
}

function getAdvertisement(bsize,tileNum,position) {
	
	document.write('<script language="JavaScript" src="http://ad.doubleclick.net/adj/'+dart_account_id+'/'+adZone+';sz='+bsize+';pos='+position+';tile='+tileNum+';ord='+adNumber+'?" type="text/javascript"></sc'+'ript>');
	++used_tiles;
}