打卡判断，增加前端浏览器mac获取，当mac获取为空时不判断

LR-20210131IOQH\Administrator

2021-06-10 6f34ab1ed6f8cb79a012a30a7b687e362c6f16c2

 zhengcaioa/zhengcaioa/Views/Project/Add.cshtml

@@ -723,7 +723,7 @@
                        }
                        else {
                            // toastr.error("失败");
                            parent.layer.msg('失败', { icon: 5 });
                            parent.layer.msg(data.Message, { icon: 5 });
                        }

                },