Variables as instance names

Hi,

I have created movie clips using loops that names them box1, box2, box3… via

i = i + 1;
duplicateMovieClip (_root.box, “box” + i, i);

but i then want to edit a textbox which is rooted inside each movie but related to the movieclip just produced. so if box1 had just been produced then:

box1.textbox.text = " E cell = "+j+“V”;

is done so effectively i am looking to do:

box+i.textbox.text = " E cell = "+j+“V”;

but this doesnt work. Does anyone have any ideas how i can do this?

sorry if this is confusing.

Thank you.