How to confront someone without offending him?

if you think he doesnt realize he is being offensive, give him the benefit of the doubt (some ppl really are that obtuse as to not consider how the other person is reacting) tell him "im sure you dont intend to be offensive, but a lot of your jokes ARE offensive to me, i dont want to be rude, but if you are going to keep telling these types of jokes, i would rather you not tell them to me" here in the United States...telling racist, prejudice, sexist.(the list goes on im sure) in the workplace is grounds for losing your job. not to mention a lawsuit by the insulted or offended person and the company that employs the two of you. if you have laws like that in your country and you have told him something along the lines of what i said above..then file a complaint..get in in writing on the record books. so when it happens again to you or another person there is an established history of him behaving like this. but like i said above..give him the benefit of the doubt when you first talk to him..it is possible he doesnt realize how offensive he is being...not likely but still possible lol!