DOM support in IE vs. NS

Philippe Le Hégaret, DOM Activity Lead, has provided a page to test user
agent DOM support [1]. I tested Netscape 7.0 and Internet Explorer 6.0 SP1
and was a bit surprised at the results.

NS supports DOM Level 2 except for 3 areas:
- UIEvents: basic user interface events
- MutationEvents: events for mutations in a DOM tree
- Traversal: Alternative traversal methods of a DOM tree

However, IE 6 fails all DOM Level 2 support tests. According to the test
page, this *could* mean IE doesn't really implement a DOM module even though
it claims to. Anyone from Microsoft care to explain these results?

The JavaScript code used to perform the checking is available. [2]

[1] http://www.w3.org/2003/02/06-dom-support.html
     [What does your user agent claim to support?]
[2] http://www.w3.org/2003/02/06-dom-support-js.js

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