ajax获取json，pc上正常使用，真机调试就undefined了

function getLawsList() {  
                mui.get('./data/laws.json',function(data) {  
                    var lawsDataList = data.laws;  
                    console.log(data.laws);  
                    for (var i = 0; i<lawsDataList.length; i++) {  
                        var lawData = lawsDataList[i];  
                        var item = document.createElement("li");  
                        item.className = "mui-table-view-cell";  
                        item.innerHTML = lawData.title;  
                        item.data = lawData.content;   
                        var detailPage = null;  
                        item.addEventListener('tap',function(){  
                            mui.alert(this.data,this.innerHTML,'确认');  
                            var content = this.getAttribute(content);  
                            if(detailPage){  
                                detailPage = plus.webview.getWebviewById('lawDetail.html');  
                            }  
                            mui.fire(detailPage,'newContent',{  
                                content:content  
                            });  
                            mui.openWindow({  
                                id:'lawDetail.html'  
                            })  
                        })  
                        lawList.appendChild(item);  
                    }  
                });  
            }  
电脑上可以正常显示，但是手机上虽然拿到了ajax里的data,但是data.laws就报undefined了  
求大神救助