报错信息，求解决

if (parseInt(data.data.totalPageCount) == currentPageNo) {  

                    //                  console.log("结束。。。")  
                    mui('#myOrderList').pullRefresh().endPullupToRefresh(true);  
                } else {  
                    //                  console.log("继续。。")  
                    mui('#myOrderList').pullRefresh().endPullupToRefresh(false);  
                    currentPageNo += 1;  
                }

页面代码：

<div class="mui-content">  
            <div class="mui-scroll" id="myOrderList">  
                <ul class="mui-table-view">  
                </ul>  
            </div>  
        </div>

错误信息：

[ERROR] : TypeError: undefined is not an object (evaluating 'mui('#myOrderList').pullRefresh().endPullupToRefresh')

安卓机上测试没有问题，iphone上测试报错信息如上，求各位解决一下，多谢啦