使用上拉加载tab选项卡，tab选项卡是动态加载的，报错$(...).pullToRefresh is not a function

使用了选项卡切换+上拉刷新（div模式），但我的选项卡是先查询的，查询结果拼接出html

var createFragmentTab = function(div, productInfo) {  
            console.log(productInfo)  
            var title = '产品列表';  
            $("#fuzzyPro").html(title);  
            var fragment = document.createDocumentFragment();  
            var a;  
            for(var i=0;i<productInfo.length;i++){  
                a = document.createElement('a');  
                if(i==0){  
                    a.className = 'mui-control-item mui-active';  
                }else{  
                    a.className = 'mui-control-item';  
                }  
                a.href='#item'+(i+1)+'mobile'  
                var html='';  
                html += '<span class="products">'+productInfo[i].PRODUCTNAME+'('+productInfo[i].NUM+')</span>'  
                a.innerHTML = html;  
                fragment.appendChild(a);  
            }  
            return fragment;  
        };

类似这样先把HTML拼接出来，下面的mui-slider-group也是一样，拼接对应的div，然后再调用

function initFreshGroup(){  
                //循环初始化所有下拉刷新，上拉加载。  
                $.each(document.querySelectorAll('.mui-slider-group .mui-scroll'), function(index, pullRefreshEl) {  
                    console.log(index)  
                    console.log(pullRefreshEl)  
                    $(pullRefreshEl).pullToRefresh({  
                        up: {  
                            auto: true,  
                            show: false, //显示底部上拉加载提示信息，可选；  
                            contentrefresh: loading_tip, //上拉进行中提示信息  
                            contentnomore: nomore_tip, //上拉无更多信息时提示信息  
                            callback: function() {  
                                var self = this;  
                                setTimeout(function() {  
                                    var ul = self.element.querySelector('.mui-table-view');  
                                    console.log(ul);  
                                    ul.appendChild(createFragment(ul, index, 5));  
                                    self.endPullUpToRefresh();  
                                }, 1000);  
                            }  
                        }  
                    });  
                });  
                var createFragment = function(ul, index, count, reverse) {  
                    var length = ul.querySelectorAll('li').length;  
                    var fragment = document.createDocumentFragment();  
                    var li;  
                    for (var i = 0; i < count; i++) {  
                        li = document.createElement('li');  
                        li.className = 'mui-table-view-cell';  
                        li.innerHTML = '第' + (index + 1) + '个选项卡子项-' + (length + (reverse ? (count - i) : (i + 1)));  
                        fragment.appendChild(li);  
                    }  
                    return fragment;  
                };  
            }

这个时候会报错，报Uncaught TypeError: $(...).pullToRefresh is not a function