simple (?) htaccess question

[eluser]mvdg27[/eluser]
Hi guys,

I think I have a simple htaccess question, but I can't find on Google how to achieve it. I hope some htaccess experts can give me a hand here

Ok. I what I want to do, is redirect a subdomain, to the same url, without the subdomain (or actually the www-subdomain).

So for example:

http://test.mydomain.com => http://www.mydomain.com

and

http://test.mydomain.com/controller/function => http://www.mydomain.com/controller/function

Any ideas? Preferably in a way that doesn't hurt the Google ranking.

Thanks! Michiel