function mudaclasse(obj , no) {
			document.getElementById("menu").className = obj ;
			var n9 = 9
			for (i=1;i<n9;i++) {
			var lista = document.getElementById('mn0' + no); 
				if (lista.className == "mn0" + no  ) {
					document.getElementById('mn0' + no).className = 'mn0' + no  + ' selecionado';
				}                    
				document.getElementById('mn0' + i).className = 'mn0' + i ;
			}
		}