anchor.diff:      + '    <title>Form based login example</title>' + #13
       + '  </head>' + #13
       + '  <body>' + #13
  -    + '    <form method="post" action="login">' + #13
  +    + '    <form method="post">' + #13
       + '     <input type="text" name="username" required>' +#13
       + '     <input type="password" name="password" required>' + #13
       + '     <input type="submit" name="submit" value="Login">' + #13
  
positive.code:   if Request.Params.Values['submit'] = 'Logout' then
    begin
      Request.Session.Free;
      Response.Redirect('login');
      Exit;
    end;
  
  
negative.code:     + '  </head>' + #13
      + '  <body>' + #13
      + '    <p>you are logged in</p>' + #13
      + '    <form method="post">' + #13
      + '     <input type="submit" name="submit" value="Logout">' + #13
      + '    </form>' + #13
      + '  </body>' + #13
  