function menu(identificador) {
	switch (identificador) {
		case 1:
			document.getElementById("img_1").src = "../imagenes/promociones_1.gif";
			document.getElementById("menu_1").style.display = "block";
			break;
		case 2:
			document.getElementById("img_2").src = "../imagenes/bolsa_1.gif";
			document.getElementById("menu_2").style.display = "block";
			break;
		case 3:
			document.getElementById("img_3").src = "../imagenes/enlaces_1.gif";
			document.getElementById("menu_3").style.display = "block";
			break;
		case 4:
			document.getElementById("img_4").src = "../imagenes/historia_1.gif";
			document.getElementById("menu_4").style.display = "block";
			break;
		case 5:
			document.getElementById("img_5").src = "../imagenes/contacto_1.gif";
			break;			
		case 6:
			document.getElementById("img_01").src = "../imagenes/inicio_1.gif";
			break;			
		case 7:
			document.getElementById("img_02").src = "../imagenes/donde_1.gif";
			break;
	}
} 

function menu_b(identificador) {
	switch (identificador) {
		case 1:
			document.getElementById("img_1").src = "../imagenes/promociones.gif";
			document.getElementById("menu_1").style.display = "none";
			break;
		case 2:
			document.getElementById("img_2").src = "../imagenes/bolsa.gif";
			document.getElementById("menu_2").style.display = "none";
			break;
		case 3:
			document.getElementById("img_3").src = "../imagenes/enlaces.gif";
			document.getElementById("menu_3").style.display = "none";
			break;
		case 4:
			document.getElementById("img_4").src = "../imagenes/historia.gif";
			document.getElementById("menu_4").style.display = "none";
			break;
		case 5:
			document.getElementById("img_5").src = "../imagenes/contacto.gif";
			break;	
		case 6:
			document.getElementById("img_01").src = "../imagenes/inicio.gif";
			break;				
		case 7:
			document.getElementById("img_02").src = "../imagenes/donde.gif";
			break;
	}
}