protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		Board b = null;
		String mode = request.getParameter("mode");
		String actionUrl ="index.jsp";
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html; charset=utf-8");
		HttpSession session = request.getSession();
		
		RequestDispatcher dispatcher = request.getRequestDispatcher(actionUrl);
		dispatcher.forward(request,  response);
	}