var gallery_items;
var num_gallery_items;
var cur_gallery_item = 0;
Event.observe(window, 'load', function() {
	gallery_items = $$('#photos_container img');
	num_gallery_items = gallery_items.size();
	if(num_gallery_items > 1) {
		setTimeout('change_gallery_item()', 4000);
	}
});

function change_gallery_item() {
	new Effect.Fade($(gallery_items[cur_gallery_item]), { duration: 0.4 });
	cur_gallery_item++;
	if(cur_gallery_item == num_gallery_items) {
		cur_gallery_item = 0;
	}
	new Effect.Appear($(gallery_items[cur_gallery_item]), { duration: 0.4 });
	setTimeout('change_gallery_item()', 4000);
}