ActionScript 2事件的最佳实践 - 有没有一种方法可以模拟ActionScript 3样式的事件？

var myMC:MovieClip = new MovieClip();
myMC.addListener(this);

function onEnterFrame():Void {
    trace("Enter frame event");
}

var myObj:Object = new Object();
myObj.addListener(this);

function onEnterFrame():Void {
    trace("Enter frame event");
}

var myMC:MovieClip = new MovieClip();
myMC.onEnterFrame = function():Void {
    trace("Enter frame event");
}

var myObj:Object = new Object();
myObj.onEnterFrame = function():Void {
    trace("Enter frame event");
}