Timer in mock exam

[Dilshan Edirisuriya]

Im developing a mock exam engine in jsp. In my quesiion jsp pages i want to add a timer. Can somebody help me to fulfil my requiremrnt.
Thank you

[Eric Pascarello]

Use setTimeout/setInterval

Eric

[Garrett Smith]

A design/engineering question.

Relying on a timer solely on the client could be a problem because someone might hack it (to give the quiz-taker more time) and make a bookmarklet out of the hack.

If it's at a kiosk that is not on the internet, you won't have to worry about that problem. If it's on the 'net, you have to take measures.

You could have a timer on the server and use keep-alive. Alternatively, you could consider a combined approach, using a timer on the server and something on the client (setTimeout, or http refresh or http redirect).

[Dilshan Edirisuriya]

Thank you Garrett. But im not clear about how to implement your idea. can you please tell me an alternative for that.