Progressbar

Hello all,

                I would like to have my progress bar in this fashion.   When a user login to a page i will read the system time. I will have a progress bar on my web form. What i need is if the user is in the same page for one hour the progress bar should show 100% and should count from 0 again. ANd the increment of progress should be shown for every 5 mins of time. Can any one give me the working code please..