Stage questions

Hi all,

I have a couple of questions which have come from developing my first full screen flash site.

The first is about animating the change in positioning that happens when a user resizes their browser. Now I have the code working fine for covering the browser resizing, but the movieclips just jump to their new location which is functional but not all that pretty. I want to know how to make this mathematical adjustment into an actionscripted tween…

here is my code so far:

 
Stage.scaleMode = "noScale";
Stage.align = "TL";
var stageListener: Object = new Object();
stageListener.onResize = fullBackground;
Stage.addListener(stageListener);
function fullBackground():Void {
  bg_mc._width = Stage.width;
  bg_mc._height = Stage.height;
  nav._x = Math.round(Stage.width / 2 - nav._width / 2);
  nav._y = Math.round(Stage.height / 2.5 - nav._height / 1.75);
}
fullBackground ();

also…while most users screens are 1028 x 764, the site I’m creating is a little bigger than this, so certain elements are a little cut off on the far left and right hand sides. I want users to be able to move their mouse to the left or right and have the stage slowly move accordingly so that they can see what’s there. Hope that makes sense…is this done with masking? Would love to know how to do this.