Accessing dyanamically named MCs

1

Trying to get from AS2 to AS3 and the simpliest things are taking too long. Maybe someone can help me please.

I have some movieclips on the main timeline named…
btnSm1_mc
btnSm2_mc
btnSm3_mc
etc…

They are physically placed on the stage, not coded.

When I click on one I want to move that MC to frame 2.
And move the last one clicked back to frame 1.

For each MC I have an onClick handler like this…
btnSm1_mc.addEventListener(MouseEvent.CLICK, onClickHandler);

The onClickHandler works fine.

I have this var outside the onClickHandler function…

var currentNumString:String = “1”;

I have my onClickHandler function like this…

function onClickHandler(e:MouseEvent) {

// need to grab the number of the MC that was clicked
// i.e. if I click on btnSm7_mc, then newNumString is “7”

var newNumString:String;
newNumString = e.target.name.substr(5,1);

// THIS IS THE PART I DON"T GET…
// I used to use this AS2 code to access dynamically named MCs…
// this doesn’t work with AS3 so this is the part i need help with the AS3 code…

this[“btnSm”+currentNumString+"_mc"].gotoAndStop(1);
this[“btnSm”+newNumString+"_mc"].gotoAndStop(2);

// set currentNumString to newNumString
currentNumString = newNumString;

}

So the question is how do you access MCs that are on the stage?

I have tried everything I can think of…
stuff like…

DisplayObjectContainer(getChildByName(“btnSm”+newNumString+"_mc")).gotoAndStop(2);

this.getChildByName(“btnSm”+newNumString+"_mc").gotoAndStop(2);

MovieClip(“btnSm”+newNumString+"_mc").gotoAndStop(2);

I can access the MC if I just reference it like…

btnSm4_mc.gotoAndStop(2);

but I need it to be able to do it like this…

this[“btnSm”+newNumString+"_mc"].gotoAndStop(2);

Any one that can help, I would be very grateful.

Thanks.