Menubar links question

I'm wondering how you made the menubar links on the top and bottom of the page so that the 'normal' underline when the mouse is over them doesn't show? I look at the page source and don't see anything unique, so I can't figure it out. I'd like to copy this approach for a site I'm playing with but my attempts always show the underline when I hover over with the mouse. I can't figure out how you eliminate/hide the underline. Sorry for so simple a question! jim - - - - - - - Appended by Scientific-Atlanta, Inc. - - - - - - - This e-mail and any attachments may contain information which is confidential, proprietary, privileged or otherwise protected by law. The information is solely intended for the named addressee (or a person responsible for delivering it to the addressee). If you are not the intended recipient of this message, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete it from your computer.