function Mostra()
			{
				var f = document.getElementById('divcontatti');
				if ( f.style.visibility == 'visible')
					f.style.visibility = 'hidden';
				else
					f.style.visibility = 'visible';
			}
			function Mostra2()
			{
				var f = document.getElementById('divcredits');
				if ( f.style.visibility == 'visible')
					f.style.visibility = 'hidden';
				else
					f.style.visibility = 'visible';
			}
			function LoadImage(Elemento)
			{
				var mainimage = document.getElementById('imagemain');
				mainimage.src = directory + Elemento + ".jpg";
			}