protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		HttpSession session=request.getSession();
		session.removeAttribute("userId");
		session.removeAttribute("password");
		session.invalidate();
		RequestDispatcher dispatcher = 
			  getServletContext().getRequestDispatcher("home.jsp");
			dispatcher.forward(request, response);
	}