var promo = new Array();
var promo_delay = 3000;
var cur_promo = new Array();

Event.observe(window, 'load', function() { start_promos(); });

function start_promos(){
	promo[1] = $$('div#promo_box_1 .promo');
	promo[2] = $$('div#promo_box_2 .promo');
	promo[3] = $$('div#promo_box_3 .promo');
	
	cur_promo[1] = 0;
	cur_promo[2] = 0;
	cur_promo[3] = 0;
	
	promo_timer = setTimeout("next_promo_frame()", promo_delay);
}

function start_promos_old(){
	promo[1] = $$('.old div#promo_box_1 .promo');
	promo[2] = $$('.old div#promo_box_2 .promo');
	promo[3] = $$('.old div#promo_box_3 .promo');
	
	cur_promo[1] = 0;
	cur_promo[2] = 0;
	cur_promo[3] = 0;
	
	promo_timer = setTimeout("next_promo_frame()", promo_delay);
}

function next_promo_frame(){
	clearTimeout(promo_timer);
	
	for (i=1; i<=3; i++){
		to_frame = cur_promo[i] + 1;
		
		if (to_frame >= promo[i].length) to_frame = 0;
	
		if (to_frame != cur_promo[i]){
			promo[i][cur_promo[i]].fade();
			promo[i][to_frame].appear();
	
			cur_promo[i] = to_frame;
		}
	}
	
	promo_timer = setTimeout("next_promo_frame()", promo_delay);
}