function ocultamenu(capa){
  var menu = document.getElementById(capa);
  menu.style.display = "none";
}
function despliega(capa){
	var menu = document.getElementById(capa);
    if(menu.style.display == "none"){
      menu.style.display = "block";
    }
    else{
      menu.style.display = "none";
    }
}