Javascript timer need help

hi m trying to display a countdown timer in my online exam project.Now I display one record at a time,containing one question.When the candidate clicks a "next" button I display the next record(next question),I've created the timer which works when the page aint posted back.When the "next" button is clicked the page is posted back n the timer gets reset.How do i prevent tht from happening?

Else is there any other better way of acheiving the same ?
:confused:

Every time the timer ticks, store the value of the timer to a hidden form field. When the next record is loaded, read the value from the hidden form field and set that as your timer's start value.

Make sense?

Ya sure does makes sense!! Will give it a try