text: var hamburger = document.getElementById("myTopnav");
  
  function myFunction() {
    hamburger.classList.toggle("responsive");
  }
  
  hamburger.querySelectorAll(".nav-link").forEach(function (navigation) {
    navigation.addEventListener("click", function () {
      hamburger.classList.toggle("responsive");
    });
  });
  
  hamburger.querySelector(".nav-link");
  
  var mybutton = document.getElementById("myBtn");
  
  window.onscroll = function () {
    scrollFunction();
  };
  
  function scrollFunction() {
    if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
      mybutton.style.display = "block";
    } else {
      mybutton.style.display = "none";
    }
  }
  
  function topFunction() {
    document.body.scrollTop = 0;
    document.documentElement.scrollTop = 0;
  }
  