Singapore Car Number Generator

To use, just fill in the 3 letters at the front of the car number along with the 4 digits, click generate, and whooo! There's the last letter!
If there are fewer than 4 digits, leave the front digit(s) empty.
For car numbers with 3 letters at the front, the first letter must be S.
And also, it seems that it does not always work.
If you got a number that doesn't work with this script, I'ld appreciate it if you email it to me, so I can improve the algorithm.
Thx =)
1st Letter:
2nd Letter:
3rd Letter:
1st digit:
2nd digit:
3rd digit:
4th digit:

Last Letter:
Created by SmLYe
Any comments? Email me at slap.yourself@hotmail.com
And remember to try out the NRIC generator too =]