ajax实现下拉菜单无刷新加载更多

 $(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');
   })
 })