anchor.diff:        ResultSet lockResult = lock.executeQuery(); // lock another delete.jsp on this row
   
         if (lockResult.next() && lockResult.getBoolean("deleted")) {
  -        throw new UserErrorException("  ");
  +        throw new UserErrorException("Сообщение уже удалено");
         }
   
         PreparedStatement pr = db.prepareStatement("SELECT postdate>CURRENT_TIMESTAMP-'1 hour'::interval as perm FROM users, topics WHERE topics.id=? AND topics.userid=users.id AND users.nick=?");
  
positive.code: %>
  <jsp:include page="WEB-INF/jsp/head.jsp"/>
  
          <title> </title>
  <jsp:include page="WEB-INF/jsp/header.jsp"/>
  
  <%
  
negative.code: 
        if (session == null || session.getAttribute("login") == null || !(Boolean) session.getAttribute("login")) {
          if (request.getParameter("nick") == null) {
            throw new BadInputException("Вы уже вышли из системы");
          }
          user = User.getUser(db, nick);
          user.checkPassword(request.getParameter("password"));
  