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// Email confirmation.
Validation.add('validate-email-confirm', 'E-mails informados precisam ser iguais!', function(v) {
    var conf = $('confirmation') ? $('confirmation') : $$('.validate-email-confirm')[0];
    var email = false;
    if ($('email')) {
        email = $('email');
    }
    var emailElements = $$('.validate-email');
    for (var i = 0; i < emailElements.size(); i++) {
        var emailElement = emailElements[i];
        if (emailElement.up('form').id == conf.up('form').id) {
            email = emailElement;
        }
    }
    return (email.value == conf.value);
});