Anyone seen a Javascript interpreter in Python?

[Brian Kelley]

> I've never seen it actually done but it's not that bad idea and I've
> thought about it on various occasions, mostly for the purpose of
> writing robot web clients in Python that could deal with JS on
> downloaded pages.  Pythoneers don't like to admit it but Python's
> semantics are not that distant from JS's.

Tell me about it.  I wrote a XUL (mozilla's layout format) interpreter 
in python and was suprised to discover that all the JavaScript commands 
used as callbacks in their tutorials were also valid python commands.