class AAA extends XML {
	var title:String;
	function onData(src) {
		if (src == null) {
			onLoad(false);
		} else {
			parseXML(src);
			defaultProcess();
			loaded = true;
			onLoad(true);
		}
	}
	function defaultProcess() {
		trace("無条件に行いたい処理");
		this.title = this.firstChild.firstChild.nodeValue;
	}
}

class CustomFunc {
	/**
	* Constructor
	*/
	private function CustomFunc() {
	}

	/**
	* Custom onRelease
	*/
	static public function customOnRelease(mc:MovieClip):Void {
		var originalOnRelease = mc.onRelease;

		mc.onRelease = function() {
			originalOnRelease();
			// 追加したい処理
			trace('custom');
		}
	}
}

test_mc.onRelease = function() {
	trace('original');
};

CustomFunc.customOnRelease(test_mc);

MovieClip.prototype.onLoad = function(){
	if(this.onRelease != undefined){
		this.orig_onRelease = this.onRelease;
		this.onRelease = function(){
			trace('before');
			this.orig_onRelease();
		}
	}
}

MovieClip.prototype.onLoad = function(){
	if(this.onRelease != undefined) {
		this.orig_onRelease = this.onRelease;
		this.onRelease = function(){
			trace('before');
			this.orig_onRelease();
		}
	}
}

	/***************************************************************************

		イベントハンドラのgetter/setter化 

	***************************************************************************/

         // onRelease のsetter
	MovieClip.prototype.setOnRelease = function( objFunc ){
		this.__onRelease = objFunc;
		this.onRelease   = this.func_onRelease;
	};

         // 不要なのかもしれないけど、getter
	MovieClip.prototype.getOnRelease = function(){
		return this.__onRelease;
	};

         // 実際のonReleaseイベントで呼び出される関数
	MovieClip.prototype.func_onRelease = function(){
		this.__onRelease();
		/* 任意の共通処理を以下に */
		trace('onRelease is Called');
	};

         // onRelease2というgetter setterの設定 
	MovieClip.prototype.addProperty( 'onRelase2',MovieClip.prototype.getOnRelease,MovieClip.prototype.setOnRelease);

function addCustumOnRelease(target:MovieClip) {
    for (var prop in target) {
        if (target[prop] instanceof MovieClip) {
            if (target[prop].onRelease != undefined) {
                target[prop].originalOnRelease = target[prop].onRelease;
    
                target[prop].onRelease = function() {
                    this.originalOnRelease();
                    trace('custum');
                }
            }
            else {
                arguments.callee(target[prop]);
            }
        }
    }
}

addCustumOnRelease(_root);

bar = function (func) {
	this._onRelease = func;
};
foo = function () {
	trace("before");
	this._onRelease();
	trace("after");
};
MovieClip.prototype.addProperty("onRelease", foo, bar);