public  void service(HttpServletRequest request,
    HttpServletResponse response) throws IOException, ServletException 
{
		Map imagesMap = (Map)request.getSession().getAttribute("IMAGES_MAP");
		if (imagesMap != null)
		{
			String imageName = request.getParameter("image");
			if (imageName != null)
			{
				byte[] imageData = (byte[])imagesMap.get(imageName);
				response.setContentLength(imageData.length);
				ServletOutputStream ouputStream = response.getOutputStream();
				ouputStream.write(imageData, 0, imageData.length);
				ouputStream.flush();
				ouputStream.close();
			}
		}
}