Building a timer feature for Project Hours

I am back from a relaxing skiing holiday in France, time to continue improving Project Hours! On request I am adding a timer feature. Users will be able to start and stop a timer to track time spent on projects and activities. The timer will run on the server, no need to keep the Project Hours program or web site open while the timer runs. The timer feature will be  available on the web site  first, mobile apps will follow.To be continued.. Bert-Jan