Timer Stopwatch - Online Timer - Online Stopwatch
http://www.timeme.com/timer-stopwatch.htm
Our online timer stopwatch lets Internet users time a test, class, meeting, speech, contest, auction, experiment, phone call, game, etc. The best virtual timer stopwatch on the web in our opinion :-)Google Code Blog: Gmail for Mobile HTML5 Series: Using Timers Effectively
article about long vs. short javascript timers, etc