encryption contest! testing my new encryption function

[elacdude]

hey, im testing my encryption/decryption functions i made. here is the ciphertext:

239L1/21/2À?3%9?1/2deÚ%ß

i encrypted a 16-digit number just as a credit card number would be encrypted in an e commerce site. i will give you the encryption and decryption functions, and a page to play around with. if you think you have figured it our or have any suggestions, email me at [e-mail]

here is the syntax-colored source code:
http://www.stovesdirect.com/mycrypt_source.html

here is the live page for experiments:
http://www.stovesdirect.com/mycrypt.php

please, give me some feedback. thanks!

[elacdude]

come on you panzies, do i have to put some money on this?