$this->uadata['geckodate'] = null;
if (preg_match('|Gecko/([0-9]+)|', $this->uastring, $regs)) {
$this->uadata['engine'] = 'gecko';
$this->uadata['geckodate'] = null;
if (preg_match('|Gecko/([0-9]+)|', $this->uastring, $regs)) {
$this->uadata['engine'] = 'gecko';