automatically filling out WordPress comment fields

[jidanni@xxxxxxxxxxx]

Gentlemen, lately I have gotten into leaving a lot of comments on a
lot of blogs, all WordPress, with the usual fields:
Leave a Reply
[                      ] Name *
[                      ] Mail *
[                      ] Website

[                    ]
[                    ]
[                    ]
[Add Comment]

The question is how can I automatically fill in the first three fields
with my personal details, which never change?

I want the POST to always have
author=jidanni&email=jidanni%40jidanni.org&url=http://jidanni.org/
in it when it leaves my browser.