function startGalleryRotation(selector,delay) {
		var layers = $$(selector);
		var i = layers.length-1;
		setInterval(function() {
			if (i > 0) {
				layers[i].set('tween', {duration: 1000});
				layers[i].fade('out');
			}
			i=i-1;
			if (i == -1) {
				for (j=layers.length-1; j>=1; j--) {
					layers[j].set('tween', {duration: 1000});
					layers[j].fade('in');
				}
				i=layers.length-1;
			}
		},delay);
	}