[jQuery] Form Validation

[ml2009]

I have just started using jQuery and wonder if you could help me
please.

I am working on a form which contains a field to enter multi-email
addresses.  How could I validate this field using jQuery?

This is what I would do if I were not using the jQuery library

function multiEmail(my_emails) {
        var email = my_emails.split(';');
        for (var i = 0; i < email.length; i++) {
        if (!validateEmail(email[i], "Your email is invalid.", 0)) {
        return false;
        }
        }
        return true;
        }
function validateEmail(email, msg) {....}

How could I customize the function above to go inside the addMethod
below?

jQuery.validator.addMethod("multiEmail", function(...) {

}