.field; //获取提交的字段
                                        var loading = layer.load(1, {
                                            shade: [0.1, '#fff'] //0.1透明度的白色背景
                                        });
                                        admin.req({
                                            type: 'delete',
                                            url: ctxPath + 'monitor-instance/clear-monitor-instance-history',
                                            data: