I've got a client
that sells PDF books online and he wants to set an expiration date and/or some
kind of validation on the downloaded PDFs. He's getting several
"returned" books and he wants to be able disable access to the "returned"
books. I guess there would be some kind of script embedded in the PDF so when
someone opened the file it would have to get some validation from the website
before it could be opened.
Any ideas would be
appreciated!
Thanks,
