I think you can put three validators on the fields, with jQuery.validator.addMethod. I don't know if you can add multiple validators for the same CSS class, so I'm putting extra CSS classes on the inputs: <input id="firstName" class="first-name-input name-input"/> <input id="lastName" class="last-name input name-input"/>
jQuery.validator.addMethod('first-name-input', validateFirstNameInput, 'First name is missing.'); jQuery.validator.addMethod('last-name-input', validateLastNameInput, 'Last name is missing.'); jQuery.validator.addMethod('name-input', validateNameInputs, 'First and Last name are missing.'); var firstNameInput = document.getElementById('firstNameInput'); var lastNameInput = document.getElementById('lastNameInput'); function validateFirstNameInput(value, element) { return ! lastNameInput.value || value; } // 1 function validateLastNameInput(value, element) { return firstNameInput.value || value; } // 2 function validateNameInputs(value, element) { return firstNameInput.value && lastNameInput.value; } // 3 Validator #1 will always run for the first name input, but will choose to never display a message as long as the last name input is empty. If the last name input is not empty, then this validator will actually check the given value (the value of the first name input) and validate accordingly. Validator #2 is in a similar situation. Validator #3 will display an error only if both are empty. Think of them as working together to only activate the errors when only a subset of the possible conditions get applied. I'm looking for a way to do this with a single validator myself. I have dynamic forms and more complex situations, so I can't employ this solution. If anyone knows how to do it, please don't hesitate to put it in. Mihai On Jan 5, 4:26 pm, claudes <claudina.sar...@gmail.com> wrote: > i have a group that contains both first and last name. i'm wondering if it is > possible to have custom messages for groups. i'm trying to achieve something > to the following: > > a. if both first and last name are not filled in: First and Last name are > Required > b. if only first is filled in: last name is required > c. if only last is filled in: first name is required > > is this possible? > -- > View this message in > context:http://www.nabble.com/validation-plugin%3A-how-to-add-custom-messages... > Sent from the jQuery General Discussion mailing list archive at Nabble.com.