Jquery scrolling down does not work on mobile

See more:

Javascript

jQuery

On mobile devices, the same products displayed when i scroll down. But its working on computer. This is test domain: http://test.galatabutikno3.com/urun/listesi

var pageNumber = 1;
var pagePost = true;
$(window).scroll(function () {
               if (pagePost) {
                if ($(window).scrollTop() >= $(document).height() - $(window).height()) {
                    $.ajax({
                        url: '/product/list',
                        data: { "pageNumber": pageNumber},
                        success: function (data) {
                            if ($.trim(data) == '' || data == null || data.result == "0") {
                                pagePost = false;
                                return;
                            }
                            else {
                                $("#productList").append(data);
                                pageNumber++;
                           }

                        }
                    });
                }
            }
        });

What I have tried:

I dont know what am i supposed to do