[Greasemonkey] reading document tree of iframe

[James Cowan]

Hi

I am loading a document into an iframe and then want to analyse the dom tree 
of the loaded document.

Using iframe.addEventListener('load', getDomTree, true); I can attach some 
code to analyse the tree fine when it is from the same domain as the 
document that contains the iframe. When I load a url into the iframe from a 
different domain, I do not seem to be able to read it 
(iframe.contentWindow.document is null).

I guess this is probably a general firefox permissions problem rather than a 
specific greasemonkey query but I was wondering whether anyone knew how to 
get around this problem.

James