window.addEvent('load',function() {
	/* settings */
	var list = $('galeria').getFirst('ul');
	var items = list.getElements('li');
	var showDuration = 4000;
	var scrollDuration = 1000;
	var index = 0;
	var width = items[0].getSize().x;
	/* action func */
	var move = function() {
		list.set('tween',{
			duration: scrollDuration,
			onComplete: function() {
				if(index == items.length - 1) {
					index = 0 - 1;
					list.scrollTo(0,0);
				}
			}
		}).tween('left',0 - (++index * width));
	};
	/* go! */
	window.addEvent('domready',function() {
		move.periodical(showDuration);
	});
});