Getting the height and width of a loaded image in ActionScript

loader-size.as

var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, function (event:Event):void {
  // although these two values are the same, accessing the later doesn't
  // work unless your image is on the same server as the HTML page, or
  // you tell the loader to check a policy file first.
  trace("loader width: " + loader.width);         // Works
  trace("bitmap width: " + loader.content.width); // Exception
});
loader.load(new URLRequest("http://www.example.com/image.png"));