Well, I suppose that you could do it by hand, but that won't get you results as quick as using CGI.pm

If you search CGI on this site, you will be brought to the documentation page that comes with CGI.pm. This can also be generated from CGI.pm file in several different formats, for details on doing this (there are a few options, manpages, HTML, so forth), look in the comments of CGI.pm.
GOOD LUCK!

"We're all different!"
"I'm not"
-The Life of Brian