/**
* Set a server as actvive or clear the active server
* @param serverId mixed numeric server id or null to clear active server
* @return boolian was operation successful
*/
public static function setActive($serverId)
{
$result = false;
if (is_null($serverId)) {
self::$__activeServer = null;
$result = true;
}
if (isset(self::$__serverList[$serverId])) {
self::$__activeServer =& self::$__serverList[$serverId];
$result = true;
}
return $result;
}