[flexcoders] Declarative and programmatic SWFLoaders

[chrycheng]

What's the difference in terms of security between declarative and
programmatic SWFLoaders?  In the ff. code, loader1 throws a security
exception while loader2 does not.

public someFunction(source:String):void
{
  var loader1:SWFLoader = new SWFLoader();
  loader1.load(source);

  loader2.source = source;
}

...

<mx:SWFLoader id="loader2"/>