在表单创建后添加jquery验证

jquery validation plugin

$('#EmployeeForm').validate({
        rules: {
            "Employee.FirstName": "required",
            "Employee.PatronymicName": "required",
            "Employee.LastName": "required",
            "Employee.BirthDay": { required: true, date: true }
        },

        messages: {
            "Employee.FirstName": { required: "*" },
            "Employee.PatronymicName": { required: "*" },
            "Employee.LastName": { required: "*" },
            "Employee.BirthDay": { required: "*", date: "00.00.00 format" }
        }
    });

在这里之前都很好用。随后,我需要向其他表单元素添加验证规则:

$('#Address_A.Phone1, #Address_A.Phone2, #Address_B.Phone1, #Address_B.Phone2')
            .rules("add", {
                digits: true
            });

这里我得到一个错误: “form”为null或不是对象

我检查,表单和表单中的所有元素都是在我添加验证之前创建的。