help: Problem with cgi form

[Gustavo Cordova]

> 
> I'm a beginner. How do I do this? It's probly very simple ......
> 
> I have a hidden input on a cgi form... 
> 
>     print '<INPUT TYPE=HIDDEN NAME= "last_pos" 
> VALUE=',last_byte_pos,'>'
> 
> I need the VALUE to be the  variable "last_byte_pos", but 
> unfortunately 
> when I run the script for the first time the script crashes 
> because it's 
> undeclared. 
> 
> What subroutine do I use to check if last_byte_pos is undeclared, and 
> assign it a default value if it is? 
> 

How can you not know if "last_byte_pos" is undeclared?
Have you assigned any values to it previously?
no?

then it's undeclared.

-gus