Menu Maker 1.1

[Lisabelle]

Hello:
I am only using the antiquated ms frontpage 2000, with xara's menu maker1.1 and I wish to remove the white bandaid like border around the horizontal navigation bar at the top of my page. I have been hoping I can edit the css code, by changing the attribute from border style= solid to border style= hidden or none??? I have a background picture that would look better against a trimmed graphic. My website screenshot is attached I hope, my first post, I am sure I wish I knew what I am doing, mostly hoping to get some advise on this issue.