jQuery+AJAX实现无刷新下拉加载更多

$(function() {  var page = 1;  var discount = $('#discount');  var innerHeight = window.innerHeight;  var timer2 = null;  $.ajax({    url: '/lightapp/marketing/verify/apply/list?page=1',    type: 'GET',    dataType: 'json',    timeout: '1000',    cache: 'false',    success: function (data) {        if (data.error_code === 0) {          var arrText = [];          for (var i = 0, t; t = data.list[i++];) {            arrText.push('<div class="consume-whole">');            arrText.push('<h3>' + t.title + '</h3>');            if (t.coupon_type == 1 ) {              arrText.push('<p>金额：￥' + t.amount + '</p>');            } else {              arrText.push('<p>优惠：' + t.amount + '</p>');            }            arrText.push('<p><span class="hx-user">用户：s账户飒飒是是是啊啊12' + t.user_name +'</span>' + '<span>核销时间：' + t.use_time + '</span></p>');            arrText.push('</div>');          }          discount.html(arrText.join(''));        };        var ajax_getting = false;　        $(window).scroll(function() {          clearTimeout(timer2);          timer2 = setTimeout(function() {            var scrollTop = $(document.body).scrollTop();　　            var scrollHeight = $('body').height();　　            var windowHeight = innerHeight;            var scrollWhole = Math.max(scrollHeight - scrollTop - windowHeight);            if (scrollWhole < 100) {              if (ajax_getting) {                return false;              } else {                ajax_getting = true;              }              discount.append('<div class="load"><img src="/lightapp/static/zhida-yunying/img/load.gif" width="6%" /></div>');              $('html,body').scrollTop($(window).height() + $(document).height());              page++;              $.ajax({                url: '/lightapp/marketing/verify/apply/list?page=' + page,                type: 'GET',                dataType: 'json',                success: function (data) {                  if (data.error_code === 0) {                    var arrText = [];                    for (var i = 0, t; t = data.list[i++];) {                      arrText.push('<div class="consume-whole"><a href="/lightapp/marketing/verify/page/info?rule_id=' + t.rule_id + '&coupon_id='+ t.coupon_id +'">');                      arrText.push('<h3>' + t.title + '</h3>');                      if (t.coupon_type == 1 ) {                         arrText.push('<p>金额：￥' + t.amount + '</p>');                      } else {                        arrText.push('<p>优惠：' + t.amount + '</p>');                      };                      arrText.push('<p><span class="hx-user">用户：账户飒111111111' + t.user_name +'</span>' + '<span>核销时间：' + t.use_time + '</span></p>');                      arrText.push('</a></div>');                    }                    discount.append(arrText.join(''));                    $(".load").remove();                  } else {                    $(".load").remove();                    discount.append('<div class="no-data">没有更多数据。</div>');                    $(window).unbind('scroll');                  };                  ajax_getting = false;                }              });　　            };            $(".load").remove();          }, 200);        });        if (data.error_code == 156006) {          $('.coupon').html('<div class="error"><h2>出错啦！</h2><p>原因：未登录</p></div>')        };        if (data.error_code == 156003) {          $('.coupon').html('<div class="error"><h2>出错啦！</h2><p>原因：权限不足~请补充</p></div>')        };        if (data.error_code == 156007) {          $('.coupon').html('<div class="error"><h2>出错啦！</h2><p>原因：服务异常</p></div>')        };        if (data.error_code == 511) {          $('.coupon').html('<div class="error"><h2>出错啦！</h2><p>原因：账号未开通直达号</p></div>')        };        if (data.error_code == 520) {          $('.coupon').html('<div class="stays"><span></span><p>暂无核销记录</p></div>')        }      },      error: function (data) {      }  })  $(window).bind("orientationchange", function() {    $('.sliders').css('left',$(window).width() / 2 +'px');  })})