         listDom = document.querySelector('#listdata'),
                requestDelayTime = 600;

            var miniRefresh = new MiniRefresh({
                container: '#minirefresh',
                down: {
                    callback: function() {
                        setTimeout(function() {
                            // 每次下拉刷新后，上拉的状态会被自动重置
                            appendTestData(listDom, 10, true);
                            miniRefresh.endDownLoading(tr