I suppose it would all depend on you have the questions set up
How many there are
etc...
If you already have it set up to go from page to page I modified the above code for the timer to work across multiple pages but it got a bit involved,
(Im still learning this but what better way to learn!)
each "Test page" will call the header file which includes the countdown
the actual countdown is started when the begin test button is pushed
That sets the endtime in a session and then each page loaded resets the start time and then subtracts the end time from the new start time therefor keeping the counter going.
you can dl the attached file (If it lets me attach it) and play around with it.
I dont know if its the most efficient way, but it is a way
You can add as many pages as you would like just keep the same format of pg2.
Hope it all makes sense if not let me know.
Like I said, dont know if its the most efficient way but this post didnt seem to gather much attention.
Good luck and let me know if it works for you.