onMouseUp = function() {}
Invoked when the mouse button is released. 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.
Note: This event handler is supported in Flash Lite only if System.capabilities.hasMouse is true or System.capabilities.hasStylus is true.
The following example defines a function for the onMouseUp method that sends a trace() action to the Output panel:
my_mc.onMouseUp = function () {
trace ("onMouseUp called");
}