// JavaScript Document
function abre_primer_menu(){ 
var popup01 = document.getElementById("menu_01")
popup01.className="visible"
var popup01 = document.getElementById("menu_02")
popup01.className="invisible"
};

function abre_segundo_menu(){ 
var popup01 = document.getElementById("menu_02")
popup01.className="visible"
var popup01 = document.getElementById("menu_01")
popup01.className="invisible"
};


function cierra_dos(){ 
var popup01 = document.getElementById("menu_02")
popup01.className="invisible"
var popup01 = document.getElementById("menu_01")
popup01.className="invisible"
};