private function _getFont($font)
    {
        switch (strtoupper($font))
        {
            case "ARIAL": return FF_ARIAL;
            case "COURIER;": return FF_COURIER;
            case "TIMES": return FF_TIMES;
            case "VERDANA": return FF_VERDANA;
            case "COMIC": return FF_COMIC;
            case "GEORGIA": return FF_GEORGIA;
            default: return FF_FONT1;
        }
    }