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Timer in mock exam

Dilshan Edirisuriya
Ranch Hand

Joined: Apr 22, 2006
Posts: 299
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

Dilshan Edirisuriya SCJP1.4, SCWCD1.4, SCBCD 5
Eric Pascarello

Joined: Nov 08, 2001
Posts: 15385
Use setTimeout/setInterval

Garrett Smith
Ranch Hand

Joined: Jun 27, 2002
Posts: 401
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).

comp.lang.javascript FAQ:
Dilshan Edirisuriya
Ranch Hand

Joined: Apr 22, 2006
Posts: 299
Thank you Garrett. But im not clear about how to implement your idea. can you please tell me an alternative for that.
It is sorta covered in the JavaRanch Style Guide.
subject: Timer in mock exam
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