Need help with kirupa gallery!

I’m trying to modify the Kirupa gallery but instead of fading in the images like this (see bellow) which doesn’t seem to like safari, how can i modify using a tweener (ie: tweenlite, mx etc.) instead?

///
p = 0;
this.onEnterFrame = function() {
filesize = picture.getBytesTotal();
loaded = picture.getBytesLoaded();
preloader._visible = true;
if (loaded != filesize) {
preloader.preload_bar._xscale = 100*loaded/filesize;
} else {
preloader._visible = false;
if (picture._alpha<100) {
picture._alpha += 10;
}
};

////