Movie swapDepths or levels or getnexthighest help!

Hello,

I have 5 photos which are separate movies that enlarge and then decrease. I have them arranged in a line, slighty overlapping with movies 1 and 5 underneath then 2 and 4 then 3 on the top level.
I would like it so that when you roll over each movie it comes to the top level then when you rollout it goes back to it’s original position.
I can’t seem to get the code right however and they keep going back in the wrong position. Here is the code that I have placed on each invisible button over each movie:

on (rollOver){
laugh.swapDepths(1);
laugh.gotoAndPlay(2);
}

on (rollOut){
laugh.swapDepths(0);
laugh.gotoAndPlay(8);
}

Please could anyone offer me any help as my brain is melting?!

Thanks!