Picture fade problem

Hello,

I am new here… I am trying to make some sort of a photo gallery which will fade in a picture on top of the one already there. I have the pictures thumbnails at the butom of the stage as buttons and when i click on one i would like it to fade in on the stage on top of the one already there.

I did it with tweening but only works properly if i go from the first one to the second one then to the third one and so on. If i click them random i have a split second of the picture that is in front of the one which is fading in (normal).

So i guess now that motion tweening is not the best way to do it. I am interested if there is any action script workarrond for this problem.

Thank’s alot guys!