Was watching my code in the debugger. I have several Ajax events that keep firing even when there's no Ajax request being sent. So, I thought I'd streamline things a bit and create an Ajax On Any Completed and then, move all of my Ajax On Completed events under it. That way, the code isn't constantly checking half a dozen events and is instead, checking just one.
Well, I was surprised to find out that I can't make an Ajax event a sub event.
So, I thought I'd be clever. I'd create a function and On Any Completed, I'd call the function to see which Ajax event completed. Wrong. Apparently you can't even make any Ajax event part of a function.