$menubar = $top->Menu;
   $file_menu = $menubar->cascade(-label => "~File");
   $file_menu->command(-label => "Restart", -command => \&Restart);
   $file_menu->command(-label => "Exit", -command => \&Exit);

   $file_menu = $menubar->cascade(-label => "Filter");

   $file_menu->command(-label => "All", -command => sub {$fname = "machines"; &Restart});
   $file_menu->command(-label => "HP-UX", -command => sub {$fname = "machines.HPUX"; &Restart});
   $file_menu->command(-label => "Linux", -command => sub {$fname = "machines.Linux"; &Restart}); 

##</code><code>##

# Get filter list
   my @filter = qw();
   my $dir = '.';
   my $x=0;
   opendir(DIR, $dir) or die $!;
   while (my $file = readdir(DIR)) {
     next unless (-f "$dir/$file");
     next unless ($file =~ m/^machines\./);
     push (@filter, $file);
   }
   closedir(DIR);

   $file_menu = $menubar->cascade(-label => "~File");
   $file_menu->command(-label => "Restart", -command => \&Restart);
   $file_menu->command(-label => "Exit", -command => \&Exit);

   $file_menu = $menubar->cascade(-label => "Filter");
   $file_menu->command(-label => "All", -command => sub {$fname = "machines"; &Restart});

   foreach (@filter) {
     $file_menu->command(-label => "$_", -command => sub {$fname = "$_"; &Restart});
}