/**
     * Checks for a valid postcode for a country
     *
     * @param   string  postcode
     * @param   string  country
     * @return  boolean
     */
    public static function is_postcode( $postcode, $country ) {
        if ( strlen( trim( preg_replace( '/[\s\-A-Za-z0-9]/', '', $postcode ))) > 0 ) return false;
        $postcode = strtoupper( trim( $postcode ));
        $regex = isset( self::$postcode_regex[$country] ) ? self::$postcode_regex[$country] : '';

        if ( Jigoshop_Base::get_options()->get_option( 'jigoshop_enable_postcode_validating' ) == 'yes'
            && $regex <> '' ) {

            $regex = '/' . $regex . '/';
            jigoshop_log( "VALIDATE POSTCODE: country = " . $country . " = regex = " . $regex );

            switch ( $country ) {
                case 'GB':
                    return self::is_GB_postcode( $postcode );
                default:
                    $match = preg_match( $regex, $postcode );
                    if ( $match !== 1 ) return false;
            }
        }
        return true;
    }