function down_position()
{
$min = new sitelanguage();
$min->select_min('position');
$min->where('position >', $this->position);
$min->get();
$o = new sitelanguage();
$o->where('position', $min->position);
$o->get();
if ($o->result_count() > 0) {
$tg = $this->position;
$this->position = $o->position;
$o->position = $tg;
$o->save();
$this->save();
return true;
} else {
return false;
}
}