onRelease = function() {}
Invoked when the mouse button is released over a movie clip. You must define a function that executes when the event handler is invoked. You can define the function on the Timeline or in a class file that extends the MovieClip class or is linked to a symbol in the library.
The following example defines a function for the onRelease method that sends a trace() action to the Output panel:
my_mc.onRelease = function () {
trace ("onRelease called");
}