The credit card validation works on the Mod 10 algorithm.This algorithm can be either written in Javascript or TAF file.It is always safer to write it in TAF or TCF file. A gist of the Mod 10 algorithm can be had from the following website.
http://www.beachnet.com/~hstiles/cardtype.html more can be searched from google. But This validation is valid only for whether it is valid credit card.If you want to make sure that the credit card holder is a valid person then you have to have an account with verisign and things like that if I am right. hope this helps . Thanx Prasad R Tango Lead OfficeTiger Database Systems India Pvt. Ltd. http://www.officetiger.com mailto:[EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Stefan Gonick Sent: Saturday, July 06, 2002 7:51 PM To: Multiple recipients of list witango-talk Subject: Re: Witango-Talk: Credit Card Validation Here's a credit card checksum tester to make sure that the CC number is valid. Stefan At 09:42 AM 7/3/2002 -0400, you wrote: >Right forgot that the Authorize net will do the final validation. But we >want to catch as many mistakes as we can before that so If JS can be >fudged guess I ll use server side Witango. > >Dan > >on 7/3/02 9:02 AM, Henning Sittler at [EMAIL PROTECTED] wrote: >For any kind of reliable validation, I always check things on the server >with Witango. Javascript can work too, but it can't be trusted, because >it can be fudged. >Of course if you're using live payment validation and processing, that >service will respond 'invalid account' or some such thing if the number is >badly formed. > >Henning Sittler >www.inscriber.com > > > > > >-----Original Message----- >From: Dan Stein [mailto:[EMAIL PROTECTED]] >Sent: Wednesday, July 03, 2002 8:56 AM >To: Multiple recipients of list witango-talk >Subject: Witango-Talk: Credit Card Validation > > > >What do people use. I have a few JavaScript's I've grabbed from Java sites >and a snippet from the component zone that has validation of all sorts all >JavaScript based. > >I'm looking to just make sure it is well formed and matches the card type. I >was thinking of using Witango to check that the expiration date has not >passed. > >Dan > > > >-- >Dan Stein >Digital Software Solutions >799 Evergreen Circle >Telford PA 18969 >Land: 215-799-0192 >Mobile: 610-256-2843 >Fax 413-410-9682 >FMP, WiTango, EDI,SQL 2000 >[EMAIL PROTECTED] >www.dss-db.com ======================================================== Database WebWorks: Dynamic web sites through database integration http://www.DatabaseWebWorks.com ________________________________________________________________________ TO UNSUBSCRIBE: send a plain text/US ASCII email to [EMAIL PROTECTED] with unsubscribe witango-talk in the message body
