gistfile1.txt

  // Below is the menu on mobile that opens the menu
  
  <a class="mobile-menu-icon" onclick="javascript:toggle('menu');">
      <img src="/images/icon-menu.svg" />
      MENU
    </a>
    
// Then there is some markup for the menu    

// This script toggles the menu open and close, jumps the page to the top, and onWindow.Resize toggles the display (for responsive).
<script type="text/javascript">
    <!--
    function toggle(id) {
        var e = document.getElementById(id);
        e.style.display == 'block' ? e.style.display = 'none' : e.style.display = 'block';
        window.scrollTo(0, 0);
        window.onresize = function(){
          e.style.display = '';
        };
    }
    //-->
    </script>