public static void askccNumber(){
		System.out.println("Please Enter your Credit-Card Details. (no spaces)");
		try {
			CustomerDetails.setccNumber(keyboard.nextLine());
			if(CustomerDetails.ccNumber.length() != creditCardLen)
				throw new Exception();
		} catch (Exception e) {
			System.out.println("INVALID: Credit card number must be " + creditCardLen + " characters");
			askccNumber();
		}
	}