codice:
_root.onEnterFrame = function() {
    if (i<num) {
        i += jump;
        _root.square._alpha = i;
    } else {
        if (pic == max_pic) {
            pic = 0;
        }
        pic++;
    }
    if (z>0) {
        z -= jump;
        _root.square._alpha = z;
    } else if (z == 0) {
        loadMovie("images/image"+pic+".jpg", "_root.square");
        i = 0;
        z = num;
    }
};
_root.square.but1.onRelease = function() {
    pic = 1-1;
    i = num;
    z = 0;
};