function mostraMenu(menuCorrente) {
		if (document.getElementById) {
				questoMenu = document.getElementById(menuCorrente).style
				if (questoMenu.display == "block") {
					questoMenu.display = "none"
				}
				else {
					questoMenu.display = "block"
				}
				return false
			}
			else {
				return true
			}
		}
		
 function mostraMenu2(menuCorrente) {    
		if (document.getElementById) {
				questoMenu = document.getElementById(menuCorrente).style
				if (questoMenu.display == "block") {
					document.getElementById("img_menu_storia").style.display="block";
					document.getElementById("up").style.display="block";
					document.getElementById("down").style.display="none";
					questoMenu.display = "none"
					
				}
				else {
					questoMenu.display = "block"
					document.getElementById("up").style.display="none";
					document.getElementById("down").style.display="block";					
					document.getElementById("img_menu_storia").style.display="none";
				}
				return false
			}
			else {
				return true
			}
		}	
		
		
 function mostraMenu3(menuCorrente) {    
		if (document.getElementById) {
				questoMenu = document.getElementById(menuCorrente).style
				if (questoMenu.display == "block") {
					document.getElementById("up").style.display="block";
					document.getElementById("down").style.display="none";
					questoMenu.display = "none"
					
				}
				else {
					questoMenu.display = "block"
					document.getElementById("up").style.display="none";
					document.getElementById("down").style.display="block";					
				}
				return false
			}
			else {
				return true
			}
		}