var periodicalImageSwap;
var nextImage = function(obj, images) {
	var myObj = $(obj);
	var index = images.indexOf(myObj.src);
	if (index > -1 && images.length > 0) {
		index++;
		if (index >= images.length) {
			index = 0;
		}
		myObj.src = images[index];
	}
}
var firstImage = function(obj, images) {
	new Asset.images(images);
	var myObj = $(obj);
	if (images.length > 0) {
		myObj.src = images[0];
	}
}
function startImageSwap(obj, images) {
	new Asset.images(images);
	nextImage(obj, images);
	periodicalImageSwap = nextImage.periodical(500, null, [obj, images])
}
function stopImageSwap(obj, images) {
	$clear(periodicalImageSwap);
	firstImage(obj, images);
}