Hittesting an array

[sora72]

I have a movieclip which is created every time the left key is pressed, and I was wondering how I would go about hittesting all of them.

Creating movieclip:
if(Key.isDown(Key.SPACE)){
for(k=0;k<=100;k++){
		lb[k] = attachMovie("left","left"+k,depth++)
}
}

Attempt at hittesting:
for(n=0;n<=100;n++){
	if (slider.hitTest("left"+[n])){ 
	trace("left")
}
}