anchor.diff:  
   <br>
     <lor:captcha/>
  -<input type=submit value="">
  -<input type=submit name=preview value="">
  +<input type=submit value="Поместить">
  +<input type=submit name=preview value="Предпросмотр">
   
   </form>
   <%
  
positive.code: <form method=POST action="add_comment.jsp">
    <input type="hidden" name="session" value="<%= HTMLFormatter.htmlSpecialChars(session.getId()) %>">
  <% if (!Template.isSessionAuthorized(session)) { %>
  :
  <input type=text name=nick value="<%= "anonymous" %>" size=40><br>
  :
  <input type=password name=password size=40><br>
  <% } %>
  <input type=hidden name=topic value="<%= topicId %>">
  
negative.code: 
        if (!Template.isSessionAuthorized(session)) {
          if (request.getParameter("nick") == null) {
            throw new BadInputException("Вы уже вышли из системы");
          }
          user = User.getUser(db, request.getParameter("nick"));
          user.checkPassword(request.getParameter("password"));
  