window.addEvent('domready', function() {

	slides = new Array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20);	
	
});

function loadPrevSlide(){
	currentSlide--;
	if(currentSlide<1){
		currentSlide = 20;
	}	
	loadSlide(currentSlide);
}
function loadNextSlide(){
	currentSlide++;
	if(currentSlide>20){
		currentSlide = 1;
	}	
	loadSlide(currentSlide);
}

function loadSlide(id){
	currentSlide = id;
	document.cookie = 'bgid='+id;
	$('bgwrapper').setStyle("background-image","url(images/backdrops/"+id+".jpg)");
}