onRollOver = function() {}
Invoked when the pointer moves over a movie clip area.
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 onRollOver method that sends a trace() action to the Output panel:
my_mc.onRollOver = function () {
trace ("onRollOver called");
}