per intero è così, ma nn funziona...perchè?
script:

Stage.scaleMode = false;
_root.createEmptyMovieClip("mc",1);
function loading(){
car = mc.getBytesLoaded();
tot = mc.getBytesTotal();
if(car>1024){
if(car == tot){
trace(mc._width);
trace(mc._height);
mc._x = Math.round((Stage.width-mc._width)/2);
mc._y = Math.round((Stage.height-mc._height)/2);
mc._visible = 1;
clearInterval(a);
b=setInterval(cambiafoto,3000);//durata intervallo 3000 = 3 sec
}
}
}
function cambiafoto(){
if(i>=10){
i=1;
} else i++;
mc._alpha = 0;
mc.loadMovie(i+".jpg");
clearInterval(b);
a = setInterval(loading,100);
}
i=1;
_root.mc.loadMovie(i+".jpg");
mc._alpha = 100;
clearInterval(a);