public function storeCookies ($cookie_file)
	{
		//make sure all cookies are stored to $cookie_file when curl handle is closed
		curl_setopt($this->ch, CURLOPT_COOKIEJAR, $cookie_file);

		//The name of the file containing the cookie data
		curl_setopt($this->ch, CURLOPT_COOKIEFILE, $cookie_file);
	}