how to move xwiki port to 80

Currently my tomcat is pointing to 8080 port And I want it to be on 80 port. Any clues as how can I do it! cheers anurag chitlangia To Err is Human, to forgive is not COMPANY policy! .- -. ..- .-. .- --. This message and the information contained herein is proprietary and confidential and subject to the Amdocs policy statement, you may review at http://www.amdocs.com/email_disclaimer.asp