Is it possible in a macro to go to a website (URL in say A1) and to
pass parameters like login name (in A2) and password (in A3), so that
you could automatically log in to that website? If so, is it then
possible to simulate mouse-clicks on subsequent pages, so that you
could choose from options to get further into the site? Option choices
could be listed in A4, A5 etc. so I could set this up for a variety of
clients.

Ultimately, what I would like to do is to print off a page (which
might be an HTML page, but is sometimes shown in a PDF viewer)
automatically. The page is a copy invoice for my client(s), and
currently I have to log on to the supplier's website, then maybe
select the client from a list, maybe select "View Invoices" from
another list, and ultimately select the appropriate invoice from
another list (usually in reverse date order). All of this takes a
considerable amount of time just to get a paper copy (which used to be
mailed to me, but suppliers now seem to prefer to give you web access
to the invoices), so I'd be grateful if I can speed this process up.

Pete