text: let navServicio = document.getElementById("nav-servicios");
  let navContactanos = document.getElementById("nav-contactanos");
  
  document.getElementById("nav-servicios").addEventListener("click", function( event ) {
      navServicio.classList.add('active');
      navContactanos.classList.remove('active');
  
  }, false);
  
  document.getElementById("nav-contactanos").addEventListener("click", function( event ) {
      navContactanos.classList.add('active');
      navServicio.classList.remove('active');
  }, false);
  
  document.getElementById("nav-header").addEventListener("click", function( event ) {
      navContactanos.classList.remove('active');
      navServicio.classList.remove('active');
  }, false);
  