function serialize($charset_encoding='')
		{
			if ($charset_encoding != '')
				$this->content_type = $this->content_type . '; charset=' . $charset_encoding;
			else
				$this->content_type = $this->content_type;
			$this->payload = serialize_ezjscoreresp($this, $charset_encoding, $this->content_type);
			return $this->payload;
		}