function conv_rights($rights) {
  $charray = preg_split('//', $rights, -1, PREG_SPLIT_NO_EMPTY);
  $value = "777";
  $count = "1";
  foreach($charray as $char) {
    if ($count == 1 and $char == "-") $value = $value - 400;
    if ($count == 2 and $char == "-") $value = $value - 200;
    if ($count == 3 and $char == "-") $value = $value - 100;
    if ($count == 4 and $char == "-") $value = $value - 40;
    if ($count == 5 and $char == "-") $value = $value - 20;
    if ($count == 6 and $char == "-") $value = $value - 10;
    if ($count == 7 and $char == "-") $value = $value - 4;
    if ($count == 8 and $char == "-") $value = $value - 2;
    if ($count == 9 and $char == "-") $value = $value - 1;
    $count++;
  }
  return $value;
}