public static function getInstancesByName($name)
	{
		if(null===self::$_files)
			self::prefetchFiles();

		$len=strlen($name);
		$results=array();
		foreach(array_keys(self::$_files) as $key)
			if(0===strncmp($key, $name.'[', $len+1) && self::$_files[$key]->getError()!=UPLOAD_ERR_NO_FILE)
				$results[] = self::$_files[$key];
		return $results;
	}