MovieClip.prototype.onRelease = function() {
	trace('hasOwnPropery(onRollOver) = '+this.hasOwnProperty("onRollOver"));
};
MovieClip.prototype.onRollOver = function() {
	trace("MovieClip.prototype.onRollOver");
};

test = true;
if (test) {
	instanceMC.onRollOver = function() {
		trace(this+'.onRollOver');
	};
}

MovieClip.prototype.onRollOver = function() {
	if (this.onPress || this.onReleaseOutside || this.onRollOut || this.hasOwnProperty("onRollOver") || this._onRelease) {
		this.useHandCursor = true;
	} else {
		this.useHandCursor = false;
	}
};