[wvxvw]

var o:Object = {};
var _mc:MovieClip = _root.attachMovie("myLibMovie","myMovie",0);
AsBroadcaster.initialize(o);
o.addProperty("x",
			  function():Number{return this.__x},
			  function(n:Number){this.__x=n;_root.myMovie._x=n;this["broadcastMessage"]("xMove",this.__x);});
var l:Object = {};
l.xMove = function(n:Number):Void {
	//Using broadcaster
	trace("x set to: "+n);
}
o["addListener"](l);
o.watch("x",xWatcher);
function xWatcher(prop,oval,nval){
	//Using object's predefined methods
	trace("I'm watching u, u moved to: "+nval);
	return nval;
}
o.x = 50;

Можно и без ентерфрейма =)