$(window).on("load scroll", function () {
                var top = $(document).scrollTop(),
                    wHeight = $(window).height();
                if (top > wHeight) {
                    $(".side6").fadeIn("fast");
                } else {
                    $(".side6").hide();
                }
            });
            $(".side6").on("click", function () {
                $("html,body").stop().animate({
                    scrollTop: 0
                }, 500);
            });