I have found that I can use the following code to capture the entire
body of a document with IE 5.x;

hiddenfield = document.body.innerHTML

Which will then (as long as it is less than 102k) allow me to pass it to
a script for fiddling with.

Is there and NN4.x equivalent which will allow me to read (I have found
examples of how to modify) my current document and store it in a hidden
field?

Paul