  <script>
      // Get the button
      var mybutton = document.getElementById("goToTopBtn");

      // When the user scrolls down 20px from the top of the document, show the button
      window.onscroll = function () {
        scrollFunction();
      };

      function scrollFunction() {
        if (
          document.body.scrollTop > 20 ||
          document.documentElement.scrollTop > 20
        ) {
          mybutton.style.display = "block";
        } else {
          mybutton.style.display = "none";
