Need help making on function work cross-platform

Hi fellow JS application programmers

I have an online html-page outline maker which has one function
(editTop() )
which works only in Firefox and not IE. I have tried about everything
I can
think of in a hour to make it work in IE, but have failed in that
hour.

I would appreciate if someone interested in dom node manipulating JS
apps
could take a look at the editTop() function and propose solutions.
All the code
is in the head of the web page: http://nottoolate.info/outlineMaker.htm

(Please do not bother too much to criticize needless global variables
or curly
braces that do not line up -- I know, I know. The problem is just in
the editTop() function
so the formatting of such a limited area should not cause too much
distress.)

Thanks in advance.

Larz