sub DisplayHTML { 
  $HTMLFileName = shift;
  open(HTMLFNH,"<$HTMLFileName")
    || die "ERROR: Can't open $HTMLFileName: $!";
  print "Content-type:  text/html\n\n";
  while ($HTMLLine=<HTMLFNH>) {
    chomp $HTMLLine;
    $HTMLLine =~ s/(\$[\w\[\]{}']+)/'"'.$1.'"'/gee;
    if ($HTMLLine =~ /(.*?)<!--\s*#exec cmd=\"?(.*?)\"? -->(.*)/) {
      $HTMLLine = $1 . `$2` . $3;
    }
    print "$HTMLLine\n";
  }
  close(HTMLFNH);
}