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

var thumbnails = $$('.thumbnails');

thumbnails.setStyle('opacity', 0.6);

thumbnails.addEvent('mouseenter', function(){
	this.set('tween', { duration : 100 })
	this.tween('opacity', 1);								   
	}).addEvent('mouseleave', function(){
		this.set('tween', { duration : 300 })
			this.tween('opacity', 0.6);	
	})



// Chiusura del DOMREADY
});