Also, you might want to consider using taint checking when using the CGI module. NEVER trust user input!!

WARNING: UNTESTED CODE!!

#!/usr/bin/perl -wT
use strict;
use CGI;

my $q=new CGI;
my $webpage=$q->param('first');

if($webpage!~/\w+/){
  print $q->header;
  print $q->start_html;
  print $q->h2('Incorrect parameter');
  print $q->end_html;
}else{
  print $q->header;
  print $q->start_html;
  print $q->h2("Param first = $webpage");
  print $q->end_html;
}
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TStanley
--------
Never underestimate the power of very stupid people in large groups -- Anonymous