Canada postal code validation

js -> postal code valid (canada)

jQuery(function ($) {
    var normalizePostalCode = function (postalCode) {
        return postalCode.replace(/[^a-z0-9]/gi, '').toUpperCase();
    };

    var formatPostalCode = function (postalCode) {
        var regex = /^([abceghjklmnprstvwxyz][0-9][abceghjklmnprstvwxyz])([0-9][abceghjklmnprstvwxyz][0-9])$/i;

        var normalized = normalizePostalCode(postalCode);
        
        var matches = normalized.match(regex);

        if (matches) {
            return matches[1] + ' ' + matches[2];
        }

        return false;
    };

    $('#test').submit(function (event) {
        event.preventDefault();
        event.stopPropagation();

        var input = $('#postalCode');

        var formattedPostalCode = formatPostalCode(input.val());

        if (formattedPostalCode) {
            input.val(formattedPostalCode);
        } else {
            alert('invalid postal code');
        }
    });
});