Closing a field by clicking a button -OS X

[simplsol at aol.com]

I need to set a flag in on a card when the contents of any of the 
fields on that card change.

This almost works:

on closeField
    setTheFlag
end closeField

The problem occurs when the user clicks a button, or uses the menu to 
leave the card. On OS X the closeField command is not sent when leaving 
a field under these circumstances - the field never loses focus.

Is there a good way to send a message (like closeField) when the user 
edits a field then clicks elsewhere?

We tried:

on mouseDown
   if the tool is "browse tool"  and (word 1 of the name of the target 
is not "field") then select empty
  pass mouseDown
end mouseDown

but it broke under version 2.8.1 - no more copy and paste!

Perhaps there is a way to remove focus from all controls on a card???

I appreciate your help, thanks in advance.
Paul Looney
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