> Has anyone got a list of the values for credit card numbers like if the
number begins with
> "6" it's a Discover Card, etc, etc.
4 = Visa
5 = Mastercard
6 = Discover (at least according to you, I don't know for sure <g>)
> I'd like to write some javascript validation using the information hidden
within the numbers.
If you want to do validation then there are a number of pre-written
validation scripts already written that not only validate that the given
number is valid (based upon a series of math tests against the number) but
also that the supplied expiration date has not already passed.
You may want to head over to Javascripts.com or SiteExperts.com and see if
you can find one... no sense in re-inventing the wheel, as they say.
Regards,
Seth Petry-Johnson
Argo Enterprise and Associates
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