All together now ...
--#--
Putting this all together gives us a general-purpose 
Perl script capable of handling all the input elements 
in a typical HTML form.<br>
<br>
For example purposes, I've included one monolithic script 
that contains code handlers for each type of element. Of 
course, if no such element exists in the form, that particular 
code won't do much.<br>
<br>
This script merely redisplays it's originating form with 
any available data filled in. Figuring out how to 
notify the user that an error occurred, or what to 
do with this new form, is your job ;-).<br>
<br>
Complete script <a href="sub.pl.txt">here.<a>
<br>