Introduction - If you have any usage issues, please Google them yourself
The ButtonEventHandler class allows for timeline-based instances
* (MovieClips) to receive button events and allows for those events to
* bubble up to parent clips. This is contrary to normal button event
* behavior (Buttons and MovieClips) which starts at the parent clip, or the
* first parent clip with any kind of button event assigned to it, and prevents
* any child clips from receiving any button events at all.
* A list of all supported events are as follows: