Online stopwatch

I dont have a stopwatch, so I found this cool online one at  http://www.online-stopwatch.com/full-screen-stopwatch. When I do my strength training in the room with the PC I'll be able to use it. Not sure how to handle the cardio, I may have to manually count the time in seconds in my head, until I can find a stopwatch (dont have a watch due to metal allergies).