Cphas

I'm writing a clip launcher in javascript for and M4L device I'm working on. It works fine except when I quit Live which causes it to "crash". By that I mean that OS X comes up with a message saying that Live quit unexpectedly. I've narrowed it down to the javascript; removing it means this problem does not occur. Can anyone offer any suggestions as to why this might be happening? I've attached the code, many thanks in advance.

Problem with javascript LiveAPI