public function get_country_code($ip_addr='')
	{
		if($ip_addr!='' && $ip_addr!=$this->ip)
		$this->set_ip($ip_addr);

		if($ip_addr=='')
		{
			if($this->ip!=$this->get_client_ip())
			$this->set_ip();
		}

		if($this->country_code!='')
		return $this->country_code;



		$sq="SELECT country_code,country_name FROM ip2country WHERE ". $this->ip_num." BETWEEN begin_ip_num AND end_ip_num";
		$r=@mysql_query($sq);

		if(!$r)
		return '';

		$row=@mysql_fetch_assoc($r);
		$this->close();

		$country_name = $row['country_name'];
		$country_code = $row['country_code'];

		$smarty->assign( "ip2c", $country_code );
		return $row['country_code'];
	}