private void firstLogin() {
       boolean flag = true;
       String tip = "请输入账号";
       while(flag) {
           String input = JOptionPane.showInputDialog(null, tip, "", WIDTH);
           if(input==null) {
        	   if(user_name==null)
        		   continue;
        	   else
        		   break;
           }
           if(usermap.containsKey(input)) {
        	   user_name = input;
        	   account.setText(user_name);
        	   break;
           }
           InfoDownload info_obj = new InfoDownload();
           if(info_obj.init(input)) {
        	   user_name = input;
        	   info_obj.getinfo();
               usermap.put(user_name, 1);
               account.setText(user_name);
               flag = false;
           }
           else {
               tip = "账号不存在，请重新输入";
           }
       }
   }