(AS3), page transition

1

Desired page behavior:
→ slide into view when loaded,
← slide out of view when another page is loaded.

With the current script I’m using, the current page simply vanishes when a new page slides in, which tends to destroy the illusion of pages moving on stage.

I suspect the solution is probably simple, but I’m having trouble figuring it out.
This seems like it should be on page one of any “learn how to make a website with Flash” tutorial, but I’m having trouble figuring out a concise way to search for this.
BTW, I’m using TweenLite(AS3) for animations, if that makes any difference.
Thanks in advance.

my code:

this.b2.addEventListener ('click', function() {
	gotoAndStop ("page1");
	TweenLite.to(b2.bar, .2, {tint:null, alpha:0, ease:Linear.easeIn});
	TweenLite.to(b2.buttText, 2, {x:0, ease:Elastic.easeOut});
});

My first guess, which does not work:

this.b2.addEventListener ('click', function() {
	gotoAndStop (nextFrame, "page1");
	TweenLite.to(b2.bar, .2, {tint:null, alpha:0, ease:Linear.easeIn});
	TweenLite.to(b2.buttText, 2, {x:0, ease:Elastic.easeOut});
});