function set_html_headers($message, $message_text="")
	{
		if(!$message_text && $this->parse_format == 'both')
		{
			$message_text = strip_tags($message);
		}

		if($this->parse_format == 'both')
		{
			$mime_boundary = "=_NextPart".md5(TIME_NOW);

			$this->headers .= "Content-Type: multipart/alternative; boundary=\"{$mime_boundary}\"{$this->delimiter}";
			$this->message = "This is a multi-part message in MIME format.{$this->delimiter}{$this->delimiter}";

			$this->message .= "--{$mime_boundary}{$this->delimiter}";
			$this->message .= "Content-Type: text/plain; charset=\"{$this->charset}\"{$this->delimiter}";
			$this->message .= "Content-Transfer-Encoding: 8bit{$this->delimiter}{$this->delimiter}";
			$this->message .= $message_text."{$this->delimiter}{$this->delimiter}";

			$this->message .= "--{$mime_boundary}{$this->delimiter}";

			$this->message .= "Content-Type: text/html; charset=\"{$this->charset}\"{$this->delimiter}";
			$this->message .= "Content-Transfer-Encoding: 8bit{$this->delimiter}{$this->delimiter}";
			$this->message .= $message."{$this->delimiter}{$this->delimiter}";

			$this->message .= "--{$mime_boundary}--{$this->delimiter}{$this->delimiter}";
		}
		else
		{
			$this->headers .= "Content-Type: text/html; charset=\"{$this->charset}\"{$this->delimiter}";
			$this->headers .= "Content-Transfer-Encoding: 8bit{$this->delimiter}{$this->delimiter}";
			$this->message = $message."{$this->delimiter}{$this->delimiter}";
		}
	}