window.addEvent('domready', function(){	
	var elems = $('images').getChildren();
	var i = 0;
	
	$('up').addEvent('click', function(){
		var myFx = new Fx.Tween(elems[i], {duration:750});
		myFx.start('width', 628, 0);
		if(i<elems.length-1)
			i++;
		else
		{
			for(i=elems.length-1; i>=0; i--)
			{
				var myFx2 = new Fx.Tween(elems[i], {duration:750});
				myFx2.start('width', 628);
			}
			i=0;
		}
	});
	
	$('down').addEvent('click', function(){
		if(i>0)
			i--;
		else
		{
			for(i=0;i<=elems.length-1;i++)
			{
				var myFx2 = new Fx.Tween(elems[i], {duration:750});
				myFx2.start('width', 0);
			}
			i = elems.length-1;
		}
		var myFx = new Fx.Tween(elems[i], {duration:750});
		myFx.start('width', 0, 628);
	});
	
});