#navbg   { background: #001e40 url(http://images.apple.com/powermac/images/navbkgrnd.gif); margin: 13px auto 0; width: 640px }
#nav             { background-color: #fff; text-align: center; width: 640px; float: left; border-bottom: 5px solid #001e40 }
#nav a         { color: #001e40; font-size: 12px; font-weight: bold; line-height: 25px; text-decoration: none; text-shadow: 0px 1px white        }
#nav a:hover         { color: #284668; text-shadow: none     }
.nav-td-off    { background-color: #e6e6e6; text-align: center; border-right: 1px solid #cccfd2; border-bottom: 1px solid #cccfd2 }
.nav-td-off:hover { background-color: #f8f8f8; text-align: center; border-right: 1px solid #cccfd2; border-bottom: 1px solid #cccfd2 }
.nav-td-on  { color: #fff; background-color: #001e40; text-align: center; border-right: 1px solid #cccfd2; border-bottom: 1px solid #cccfd2 }
.nav-td-on:hover { color: #fff; background-color: #002b5a; text-align: center; border-right: 1px solid #cccfd2; border-bottom: 1px solid #cccfd2 }
.navOver   { color: #fff; text-shadow: 0px 1px black}