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


	
	$each($$('.ikony'),function(el) {

  	var tween = new Fx.Tween(el,{
		duration: '500',
 		transition: 'expo:out',
		link: 'cancel',

		});


	
	el.addEvent('mouseenter', function() { tween.start(
		'background-position', '10px 10px'
		);});

	el.addEvent('mouseleave', function() { tween.start(
		'background-position', '240px 10px'
		);});
 
 	});
});