#!/usr/bin/perl -w
   use CGI qw/ :html3  /;

   my %hash;
   my $key;
   my %names;
   my $value;
   my $i;

   foreach $i (1..10) {
      $key = $i % 3;
      $value = $i;
      $hash{$key} ||= [];
      push @{$hash{$key}}, $value;

   }

   $query = new CGI;
   print $query->header();

   foreach $key (0..2) {
      $names[$key] = "key $key";
      print $query->p(join( '/', @{$hash{$key}}), " modulo 3 give $key\n");
   }

   print $query->start_form();

#
   print $query->table(
                       TR([
                          th(@names),
                          td(print $query->popup_menu ( -name=>'0',
                                           -values=>[@{$hash{0}}],
                                           -default=>$hash{0})
                            ),
                          td(print $query->popup_menu ( -name=>'1',
                                           -values=>[@{$hash{1}}],
                                           -default=>$hash{1})
                            ),
                          td(print $query->popup_menu ( -name=>'2',
                                           -values=>[@{$hash{2}}],
                                           -default=>$hash{2})
                            ),

#
# Instead, I'd like to write a single instruction 
# I know this can't work ... it's just a note
# 
#                         td($query->popup_menu ( -name=>"$key",
#                                          -values=>[@{$hash{$key}}],
#                                          -default=>$hash{$key})
#                           ),
                       ])
                    );

   print $query->end_form();
   print $query->end_html();