Question about the photo gallery tutorials of Kirupa

hi, I am learning to mak a flash photogallery for my friends(important in my life), so i really want to make the gallery nice, then i went to this site(http://www.kirupa.com/developer/mx/photogallery.htm) of kirupa and learn how to make a photo gallery, i amended the AS little bit, and it works.
but now I want a diffrent effect that I want the gallery would go to next image automaticly(fade in/out) without click the button, and each image gonna stay for about 4sec.
anybody knows how to add the AS on it?
very appreciate for u hands!!

oh i got the answer from another thread,please del this…

thanks!!