public function setDefaultType ($value, DataContainer $dc)
	{
		$db = Database::getInstance();
		
		if ($value)
		{
			// There can only be one default element
			$db->prepare("UPDATE tl_elements SET defaultType='' WHERE NOT id=? AND pid=?")
			   ->execute($dc->activeRecord->id, $dc->activeRecord->pid);
		}
		
		return $value;
	}