I wan't to get the mail and website options off my mail comments form.

Many visitors of my page find it hard to leave there adres behind so i want to get rid off those tabs can anybody help me.
So that they only fill in : name and comments

http://joniesamateurs.nl/index.php?blog=2&title=changed_comments&more=1&c=1&tb=1&pb=1#comments

warning it's 18+ :D