var promo_count = 0;
var promo = 0;
var fadePromos = function(){
	var currentP = promo
	if (promo == promo_count){var nextP = 1;promo = 1;}else{var nextP = promo+1;promo++;}
	myFx3 = new Fx.Tween($('promo'+currentP),{property: 'opacity',duration: 2000});
    myFx3.start(1,0); 
    myFx4 = new Fx.Tween($('promo'+nextP),{property: 'opacity',duration: 2000});
    myFx4.start(0,1);
}
window.addEvent('domready', function() {
	promo_count = $('promos').getChildren('a').length;
	promo = Math.ceil(Math.random()*(promo_count));
	$('promo'+promo).setStyle('visibility','visible');
	if(promo_count > 1)
		var promos = fadePromos.periodical(5000);
});