protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//ZbV̕
		HttpSession session = request.getSession();
		
		//ZbVIuWFNglogino
		boolean login = false;
		if (session.getAttribute("login") != null) {
			login = (Boolean)session.getAttribute("login");
		}
		
		//ZbVIuWFNgdisplayUserNameoB
		String displayUserName = (String)session.getAttribute("displayUserName");
		
		//OCsFOCʂ
		if (!login) {
			response.sendRedirect("login.html");
		}
		
		//LbVNA
		response.setHeader("Cache-Control",
				"no-store,no-cache, must-revalidte");
		response.addHeader("Cache-Control",
				"post-check=0, pre-check=0");
		response.setHeader("Pragma", "no-cache");
		response.setDateHeader("Expires", 0);
		Date today = new Date();
		response.setDateHeader("Last-Modified", today.getTime());
		
		//o͐̃Reg^CvZbg
		response.setContentType("text/html; charset=UTF-8");
		
		//o͐oAϐoutɑ
		PrintWriter out = response.getWriter();
		
		//o͓eZbg
		out.println("<html><body>");
		out.println("Login: <b>" + displayUserName + "</b>");
		out.println("<hr>");
		out.println("<a href=\"Menu\">yj[z</a>");
		out.println("<a href=\"Logout\">yOAEgz</a>");
		out.println("<hr>");
		out.println("bZ[W͂ĂB<br><br>");
		out.println("<form action=\"WriteMessage\" method=\"POST\">");
		out.println("^CgF<br>");
		out.println("<input type=\"text\" name=\"title\" size=\"50\">");
		out.println("<br><br>");
		out.println("bZ[WF<br>");
		out.println("<textarea name=\"message\" cols=\"40\" rows=\"5\"></textarea>");
		out.println("<br><br>");
		out.println("<input type=\"submit\" value=\"bZ[W̓o^\">");
		out.println("</form>");
		out.println("</body></html>");
		
		//o͂
		out.close();
	}