title: controlling the properties of a sprite's child sprites
body: <p>I have a sprite in which I have added other sprites.
  Something like:</p>
  
  <pre><code>var sp_main:Sprite = new Sprite();
  var sp_group:Sprite = new Sprite();
  
  for(i:int = 0; i &lt; 10; i++)
  {
     var temp:Sprite = new Sprite();
  
     sp_group.addChild(temp);
  }
  
  sp_main.addChild(sp_group);
  
  //this part doesn't seem to work... i don't mind doing it another way, but 
  //am unaware of one.
  sp_main["sp_group"].alpha = 0.0;
  </code></pre>
  
  <p>Any thoughts on how I might accomplish this or something similar?</p>