PO BOX js Regex validation

po-box-validation.js

/**
 1.1     Checkout
 - Gorilla will add custom client side validation to the shipping method address field to test if the string contains a pattern of characters that would denote that the string contains the words PO Box.
 - If the validation fails the user will be displayed a message stating that the shipping address cannot be a PO Box.

 ?       P.O. Box
 ?       PO. Box
 ?       PO Box
 ?       POBox
 ?       P O Box
 ?       P.O Box
 ?		 PO
 ?		 Postal Box
 ? 		 Post Office Box

 (PO Box|POBox|PO. Box|P.O. Box|P O Box|P.O Box|Postal Box|Post Office Box|PO)
 \bP(ost)?[ \.]*O(ffice)?[ \.]*Box\b
 */
var poRegex = /\bP(ost|ostal)?([ \.]*O(ffice)?)?([ \.]*Box)?\b/i;
Validation.addAllThese([
	['po-box-validation', 'Shipping address cannot contain a PO Box number.', function(v, el) {
		if (!Validation.get('IsEmpty').test(v)) {
			if (poRegex.test(v)) {
				return false;   
			}
		}
		return true;
	}],
	['address-select', 'Shipping address cannot contain a PO Box number.', function(v, el) {
		if (!Validation.get('IsEmpty').test(v)) {
			if (poRegex.test(el.options[el.selectedIndex].textContent)) {
				return false;
			}
		}

		return true;
	}]
]);


/**
 * Gorilla added to force validation on PO box based on the change
 * in radio selection for if this billing address can be used
 * for shipping.
 *
 * @param flag
 */
Billing.prototype.setSameShippingAddress = function(flag) {
    $('shipping:same_as_billing').checked = flag;
    Validation.test('address-select', $('billing-address-select'));
};