How do I zoom in and out using Actionscript?

How do I zoom in and out using Actionscript?
I have the following code to move an object around:

onClipEvent(load)
 {
     speed = 10;
     speedx = speedy = speed;
     targetx = this._x;
     targety = this._y;
 }
 onClipEvent(enterFrame)
 {
     _x += (targetx - _x)/speedx;
     _y += (targety - _y)/speedy;
 }

What I do is change the values of targetx and targety.

What I want to do is move the object and then zoom in or out.

So, I need to know:

  1. How to zoom in and out usng Actionscript.
  2. AND I need to know how I can do this at the END of the above animation?

Any help would be appreciated.

Thanks.

OM