<script type="text/javascript">
    $(document).ready(function() {
    var hashTagActive = "";
    $(".scroll").click(function (event) {
      if(hashTagActive != this.hash) {
          event.preventDefault();
          var dest = 0;
          if ($(this.hash).offset().top > $(document).height() - $(window).height()) {
              dest = $(document).height() - $(window).height();
          } else {
              dest = $(this.hash).offset().top;
          }
          $('html,body').animate({
              scrollTop: dest
          }, 2000, 'swing');
          hashTagActive = this.hash;
      }
    });
    });
    </script>