public static function setCurrency($currency)
{
self::$code = $currency;
if (JO_Session::get('currency') != $currency) {
JO_Session::set('currency', $currency);
}
if (JO_Request::getInstance()->getCookie('currency') != $currency) {
setcookie('currency', $currency, time() + 60 * 60 * 24 * 30, '/', JO_Request::getInstance()->getServer('HTTP_HOST'));
}
}