bar = function (func) {
	this._onRelease = func;
};
foo = function () {
	if (this._onRelease == undefined) {
		return;
	}
	trace("before");
	this._onRelease();
	trace("after");
};
MovieClip.prototype.onRollOver = function() {
	if (this.onPress || this.onReleaseOutside || this.onRollOut || this.hasOwnProperty("onRollOver") || this._onRelease) {
		this.useHandCursor = true;
	} else {
		this.useHandCursor = false;
	}
};
MovieClip.prototype.addProperty("onRelease", foo, bar);