下滑获取数据后不能结束下滑的雪花

            mui.init();  
            (function($) {  
                //阻尼系数  
                var deceleration = mui.os.ios?0.003:0.0009;  
                var sel = document.querySelectorAll('.mui-slider-group .mui-scroll');  
                $('.mui-scroll-wrapper').scroll({  
                    bounce: false,  
                    indicators: true, //是否显示滚动条  
                    deceleration:deceleration  
                });  
                $.ready(function() {  
                    //循环初始化所有下拉刷新，上拉加载。  
                    $.each(sel, function(index, pullRefreshEl) {  
                        var num = this.getAttribute('index');   
                        $(pullRefreshEl).pullToRefresh({  
                            down: {  
                                callback:function(){  
                                    var self = this;  
                                    mui.getJSON('http://cdjiubo.com/index.php/Home/Article/index/appjson/1/p/1/sid/1/rows/1',function(data,textStatus){  
                                            var table = document.getElementById('table');  
                                            var text = data.rows[0].content;  
                                            var alg = document.createElement("a");  
                                            alg.innerHTML = text;  
                                            table.insertBefore(alg,table.firstChild);  
                                    });  
                                    self.endPullDownToRefresh();  
                                }  
                            }  

                        });  

                    });  
                });  
            })(mui);