(function ($) {

  Drupal.behaviors.davyinui.inviews = function(box){
    // inview block anmi
    $(box).each(function(index, el) {
      var $this = $(el);
      $this.addClass('new-inview-backend');

      new Waypoint.Inview({
        element: el,
        enter: function(direction) {
          $this.removeClass('new-inview-backend', $(this).is('.new-inview-backend'));
        },
        entered: function(direction) {
          $this.addClass('new-inview-current');
          $this.removeClass('new-inview-backend', $(this).is('.new-inview-backend'));
        },
        exit: function(direction) {
          $this.removeClass('new-inview-current', $(this).is('.new-inview-current'));
        },
        exited: function(direction) {
          $this.addClass('new-inview-backend');
        }
      })
    });
  };

}(jQuery));