se connecter a une autre base dans plugin

	function &getDBO()
	{
		static $instance;

		if (!is_object($instance))
		{
			//get the debug configuration setting
			$conf =& JFactory::getConfig();
			$debug = $conf->getValue('config.debug');

			$instance = JFactory::_createDBO();
			$instance->debug($debug);
		}

		return $instance;
	}

$db = & $this->getDBO();

	function &getDBO()
	{
		static $instance;

		if (!is_object($instance))
		{
			//get the debug configuration setting
			$conf =& JFactory::getConfig();
			$debug = $conf->getValue('config.debug');

			$instance = $this->_createDBO();
			$instance->debug($debug);
		}

		return $instance;
	}

	function &_createDBO()
	{
		jimport('joomla.database.database');
		jimport( 'joomla.database.table' );

		$conf =& JFactory::getConfig();

		$host 		= //votre valeur
		$user 		= //votre valeur
		$password 	= //votre valeur
		$database	= //votre valeur
		$prefix 	= //votre valeur
		$driver 	= $conf->getValue('config.dbtype');
		$debug 		= $conf->getValue('config.debug');

		$options	= array ( 'driver' => $driver, 'host' => $host, 'user' => $user, 'password' => $password, 'database' => $database, 'prefix' => $prefix );

		$db =& JDatabase::getInstance( $options );

		if ( JError::isError($db) ) {
			header('HTTP/1.1 500 Internal Server Error');
			jexit('Database Error: ' . $db->toString() );
		}

		if ($db->getErrorNum() > 0) {
			JError::raiseError(500 , 'JDatabase::getInstance: Could not connect to database <br />' . 'joomla.library:'.$db->getErrorNum().' - '.$db->getErrorMsg() );
		}

		$db->debug( $debug );
		return $db;
	}