Fill Javascript form

[Matteo]

Hi everybody,
I have to fill a web form to authenticate and connect to the internet.
I thought it would have been easy to make a script to do that
automatically
on startup.

Unfortunately, it turned out that the form is written in JavaScript,
and
urllib2 therefore fails to even fetch the form.

The form itself is very simple, just name and password fields and a
"submit"
button.

Do you know of any workaround?