ode == "200") {
                                    callback.call(this, data.result);
                                    if(data.result == null || data.result.length<=0){
                                        //开启新增根
                                        $('#add_root').removeAttr("disabled")
                                    }

                                }else{
                                    callback.call(this, []);
                                    layer.msg(data.msg);
        