ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
Chapter 18. ActionScript Language Reference
MovieClip.onRelease( ) Event Handler
Flash 6
Button event; occurs when the mouse is pressed and then released over the clip
mc.onRelease() on (release) { statements }
Description
The onRelease( ) event handler is identical to the Button.onRelease( ) event, except that it can also be applied to movie clip instances (though not main movies such as _root, _level0, etc.).