Help With Swapping A Movie Clip

Question

homerreg.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
homerreg.addEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
homerreg.buttonMode=true;
function mouseDownHandler(evt:MouseEvent):void{
     homerreg.startDrag();
     homerreg.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
function mouseUpHandler(evt:MouseEvent):void {
     homerreg.stopDrag();
     homerreg.removeEventListener(MouseEvent.MOUSE_MOVE  , mouseMoveHandler);
function mouseMoveHandler(evt:MouseEvent):void{
     if (homerreg.x>pumpkin.x){
          homerreg.alpha = 0.4;
     homerreg and homerzombie are movieclips. This is from a tutorial and
the last line states if the homerreg movie clip passes the pumpkin
movie clip in the center of the screen it's alpha channel changes.
What I want to do is swap the "homerreg" movie clip and have the
homerzombie movie clip come in when it passed the pumpkin movie clip.
Anyone know how I could do this?
Thanks in advance.

Answer 1

If you retained the homerreg movieclip as the main one, having regular homer on frame 1 and zombie homer on frame 2, then the following code should work in place of what you had before...
function mouseMoveHandler(evt:MouseEvent):void{
     if (homerreg.x>pumpkin.x){
          homerreg.gotoAndStop(2);