Originally Posted by ckcy2008 View Post
Thankx for ur reply

the input box, use for key in only.....
so, i have to create to input box??
[input with length 4] - [input with lenght 2] <--- is it like this?

yeah, that's what I mean (if you don't want to use javascript).
But if you want to use javascript, maybe you can try SpOonWiZaRd code