I have all 3 cards (AmEx, Visa, Mastercard) and I can see the full form and along with the validations, given an AmEx card. Is there any particular reason why t

I have all 3 cards (AmEx, Visa, Mastercard) and I can see the full form and along with the validations, given an AmEx card. Is there any particular reason why the same can't be done with the Visa and Mastercard? Regardless, fantastic piece of code! Will definitely think of incorporating this.