text: ﻿
      function Response() {
              var x = document.getElementById("myTopnav");
              if (x.className === "topnav") {
          x.className += " responsive";
              } else {
          x.className = "topnav";
              }
          }
  
          function openFormSignup() {
          document.getElementById("sign-up_form").style.display = "block";
          }
      