var i = 0;

window.addEvent('domready',function(){

	$$('div.efekt').each(function(el){
		el.setStyle('top','-100');
	});
	rotateNext(0);
	autoRotate.periodical(5000);
	
});

function rotateNext(val){
	resetRotatorProperties();
	i=val;
	if($$('div.efekt')[val]!=null){
		$$('div.efekt')[val].set('tween', {transition: Fx.Transitions.Bounce.easeOut, duration: 1500});
		$$('div.efekt')[val].tween('margin-top', 0);
	}
}
function autoRotate(){
	rotateNext(i);
	i++;
	if(i>=$$('div.efekt').length){
		i=0;
	}
}
function resetRotatorProperties(){
	$$('div.efekt').each(function(el){
		el.set('tween', {transition: Fx.Transitions.Bounce.easeOut, duration: 1500});
		el.tween('margin-top', 100);
	});
}