var rotators	= new Array();

function initRotator (container, banners) {
	var myRotator = new Array();
	myRotator['banners']   = banners;
	myRotator['currentAd'] = Math.floor( Math.random() * 2 );
	myRotator['container'] = container;
	rotators.push( myRotator );	
	rotator();
}

function rotator() {
	for (i=0; i<rotators.length; i++) {
		var id = rotators[i]['container'];
		rotators[i]['currentAd']++;
		var currentAd = rotators[i]['currentAd'];
		if (currentAd == rotators[i]['banners'].length) {
			rotators[i]['currentAd'] = 0;
			currentAd = 0;
		}
		document.getElementById(id).innerHTML = rotators[i]['banners'][currentAd];
	}
}