//向上滑动显示

        var initTop = 0;

        var i = 1;

        $(window).scroll(function(){

             var scrollTop = $(document).scrollTop();

             if(scrollTop < initTop){

                 var top = document.documentElement.scrollTop + document.body.scrollTop;

                 if(top == 0){

                        i++;

                        showMessage(i,'loadold');

                 }

             }

         initTop = scrollTop;

        });

$(".alllist").scroll(function(){

              distanceScrollCount = $(this)[0].scrollHeight;

              distanceScroll = $(this)[0].scrollTop;

              distanceSum = distanceScroll + divHight + 35;

              if(distanceSum >= distanceScrollCount){

                i++;

                showMessage(i,'loadold');

              }

        });