anchor.diff:      },1000);
     });
   })();
  -
   </script>
   <script type="text/javascript">
     (function(){
  
positive.code:       if (clickNumber < 1) {
          document.getElementById('btn-back').style.display = 'none';
        }
        if (clickNumber < 9) {
          document.getElementById('btn-next').style.display = 'unset';
        }
  
        document.getElementsByClassName('container-slider')[0].style.transform = "translateX("+size_+"px)";
        return false;
      });
  
      function debounce(func, wait, immediate) {
        var timeout;
  
negative.code:     var clickNumber = 0;
      var init = true,
          end = false;
      var slidesNum = document.querySelectorAll('.container-slider > div').length;
  
      document.getElementById('btn-next').addEventListener('click', function(){
        clickNumber += 1;
  