public function Connect ($dsn = FALSE, $user = FALSE, $pass = FALSE, $options = FALSE)
	{
		
		if (!$this->connected)
		{
			
			$this->_dsn		= $dsn?: $this->_dsn;
			$this->_user	= $user?: $this->_user;
			$this->_pass	= $pass?: $this->_pass;
			$this->_options	= $options?: $this->_options;
			
			parent::__construct ($this->_dsn, $this->_user, $this->_pass, $this->_options);
			
			$this->connected	= TRUE;
			
		}
		
	}