Problem with function repeating itself

Problem with function repeating itself

Hey,
I've got a big problem with one of my functions I need for my project. Everything works fine except of the thing that the function repeats the more often you call it. For example if you called it the first time everything works fine. But the second time the first call gets repeated as well as the new one, so I get two functions... A little sample of this code can be found here. To see the problem click on the Divs containing "T2" and leave the Popup. You'll get an alert.

Thanks a lot,
picola