Here is a working copy of the code:
http://junk.hostsaba.com/timetracker/

currently what happens is that if one of the times is clicked on, it will turn into a drop-down time selector.

If while that time-selector is open _another_ time is clicked on, that too will turn into the active state where the user can select a time from the drop-down menu.

THE QUESTION IS THIS:
How can I make it so that only A SINGLE time selector is active on the page.

When a new time is clicked, the previous time selector will cancel?

Thanks