title: How to change current container on createJS
body: <p>I`m making one stereoscopic animation with createjs, a lot of balls rolls to you without collision, but they have different speeds.
  They start with scale .001 (far away) to 1 (when hits you), the balls have differents speeds, so if one ball grow faster than other, it should become in the front the others too, so i have created 1000 containers, and if i multiply (scaleX or Y to 1000) i got the desired container.
  If i dont do this the ball position (front or behind) will be defined by the creation order. the newest one created will be in the front, and the oldest behind.</p>
  
  <p>But how can i change the ball to another container?</p>