>I've scratched my head raw on this one but cannot find the clue I need to solve this puzzle.

Ouch!!!

>the "parent.framename.location='editing.asp'" line but keep getting a "page is >not found" error message.

I've run into times when a file name is mixed case - it's usually on an image file, but...

Also, have you tried another file just to see if your syntax is correct?