window.addEvent('domready', function() {
	 
	var myFx = new Fx.Tween($('tweener'));
	myFx.set('opacity', '0');
	
	var tweenFade1 = function() {
		//to avoid fade in on refresh :)
		var nV = $('noview');
		var nVP = nV.getProperty('title');
		//alert(nVP);
		if (nVP == 'primoaccesso')
		{	
			//window.alert('test');
			nV.setProperty('title', 'secondoaccesso');
		}
		if (nVP == 'secondoaccesso')
		{	
			//here you create your selector
			//then you add .fade
			//finally declare a value between 0 and 1 (0 being invisible, 1 being full visibility)
			$('tweener').fade('1');
		}
   }
	$('documento').addEvent('mousemove', tweenFade1);
});