I have a quiz application on my website. Where user can take timed quiz. Right now we are running the clock on client side using javascript. I want programmer to put time on server. So that even if user press back or refresh the page timer does not stop. And you should integrate a message some where for the user that if they press back or refresh timer will not stop. For this you can user either colorbox which is already being used on the site or any other display method for 10 sec. before starting the quiz. But i would prefer colorbox.