Okay, I have a few boxes, I want them to start out with an alpha value of 0, then after the first box alpha value reaches 75, I want the second one to start fading in, this is what I have so far, but they all fade in at the same time, can anyone point me in the right direction with this?

```
MovieClip.prototype.fadeIn = function() {
if (this["b"+(i-1)]._alpha>=75) {
this._alpha += 15;
} else {
this._alpha = 0;
}
};
for (i=1; i<5; i++) {
var box = this["b"+i];
box._alpha = 0;
/*b1.onEnterFrame = function() {
if (this._alpha<=100) {
this._alpha += 15;
} else {
delete this.onEnterFrame;
}
};
*/
box.onEnterFrame = function() {
this.fadeIn();
};
}
```