Re: Credit card validation routine

Hi dries

"dries" <dries (AT) driesbessels (DOT) removebeforeuse.com> skrev i en meddelelse
news:jihph0dpgdsaf340odb79pjbcdeskuv47s (AT) 4ax (DOT) com...

A friend of mine has a problem with his credit card validation routine
and it is probably a simple thing to solve but I cannot find it.
It has to do with the expiry dates.
What happens is that as each month passes, that month is then not
recognised as being valid, even though the year makes it still valid.
i.e. the number of the month entered has to be bigger than the number
of the current month. Therefor, if it is in august now 09/2005 wil be
valid but 08/2005 will be rejected.
Below quoted is the code, could anybody make sense of this problem?
Thanks!
...

//now check that the date is valid i.e. greater or equal to now
thisdate = new Date();
thisyear = thisdate.getYear() + 1900;
thismonth = thisdate.getMonth();
if ((CCmonth <= thismonth) && (CCyear <=
thisyear))
{
alert("Your credit card has expired");
failed = true;
...
How about only copying the code which does the date checking, all the rest

isn´t of any interest.
Anyway your friends problem is simple.
You have to check month and year seperatedly.

First check the year:" CCyear > thisyear " then everything's fine cause the
card doesn´t expire this your or hasnn´t expired yet
then check for if "CCyear ==thisyear" you have to check the month, if the
month checks out:" CCmonth>=thismonth " everythings allright. the remaining
case is CCyear< thisyear, so you can return false.
Hope tha gets you on the way

Robert


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