document.createElement("header"); 
document.createElement("nav"); 
document.createElement("section");
document.createElement("article");
document.createElement("footer");

function mostrarocultar(capa, capa2, capa3, capa4){
document.getElementById(capa).style.display ="block"
document.getElementById(capa2).style.display ="none"
document.getElementById(capa3).style.display ="none"
document.getElementById(capa4).style.display ="none"
}

function mostrarocultar3(capa, capa2, capa3){
document.getElementById(capa).style.display ="block"
document.getElementById(capa2).style.display ="none"
document.getElementById(capa3).style.display ="none"
}

function mostrarocultar2(capa, capa2){
document.getElementById(capa).style.display ="block"
document.getElementById(capa2).style.display ="none"
}