(function($) {
                $.fn.whenVisible = function(action) {
                    $(this).each(function() {
                        var el = this;
                        var timer = setInterval(function(){
                        if ($(el).height() == 0) {
                            return;
                        }

                        action.call(el);

                        $(el).trigger('visible');

                        clearInterval(timer);
                    }, 0.1);
                    });


                    return this;
                };
            })(jQuery);