Field Losing Focus?

[Dan Friedman]

Hello!
 
I have a field (field 1) where a user can type whatever they like.  I have
another field (field 2) with a list of items the user can choose from.
Lastly, I have a button that the user can click to copy the the selected
line in field 2 into field 1.

Now, I want the text from field 2 to be placed into field 1 at the location
of the cursor.  In the button's script, I have this:

on mouseUp
  focus on field 1
  put word 2 of the selectedChunk into tChar
  put the hilitedText of field 2 into tText
  put tText after char tChar of field 1
end mouseUp

This works fine if you don't click in field 2.  As soon as you click in
field 2, the selectedChunk  is empty.

I have set the traversalOn of both the button and field 2 to "off"

Anyone have any ideas?

Thanks!
Dan