function confirm_nsid($username)
{
	if(!preg_match('%\d+@N\d{2}%', $username)) {
		$url = 'http://api.flickr.com/services/rest/?method=flickr.people.findByUsername&format=rest&api_key=39b1bcf1b0c84a24435677252085d436&format=php_serial&username=' . urlencode($username)
		$result = RemoteRequest::get_contents($url);
		if($result = unserialize($result)) {
			if(isset($result['user']['nsid'])) {
				$username = $result['user']['nsid'];
			}
		}
	}
	return $username;
}