I think this question is a little strange. I've written alot of CGI's and I haven't ever needed to find out the parameter names from a static file... I have, however, needed to know the names of all the parameters in the code for a CGI itself. That's easy using CGI.pm. From the documentation:

use CGI;
@names = $query->param;
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Where @names is an array containing the name of every parameter item submitted to the CGI. If you really must pick out the HTML attributes (because really, that's all parameter names are) your best bet is to use HTML::Parse or somesuch.

Gary Blackburn
Trained Killer