
Make It Disappear
<style type="text/css">
.topbar { display: none; }
</style>

Borders
To remove the border from the topbar, use:
<style type="text/css">
.topbar, .topbar td { border: none; }
</style>
To change the border style instead:
<style type="text/css">
.topbar { border: 1px solid red; }
.topbar td { border: none; }
</style>
Nb, the
border: none; part of this code is deliberate, as the topbar table also
has an inner border which would still show up otherwise.
[ More Border Styles ]

Background
To set a background color for the whole menu:
<style type="text/css">
.topbar { background: red; }
</style>
Or a background image:
<style type="text/css">
.topbar { background: url('http://www.PATH TO YOUR IMAGE.gif'); }
</style>
More on
[ Backgrounds ]

Text Styles
To change the plain (none linked) text bit:
<style type="text/css">
.topbar { color: red; }
</style>
To change the links (and hover links separately):
<style type="text/css">
.topbar a:link, .topbar a:visited {
color: red;
background: navy;
font-size: 8pt;
}
.topbar a:hover {
color: orange;
background: green;
font-size: 8pt;
}
</style>
More
[ Text Styles ]

Size
You can stretch or shrink your topbar table by giving it a width and/or height:
<style type="text/css">
.topbar {
width: 500px;
height: 40px;
}
</style>

Positioning
To move your topbar table a bit to the left or right, you can use margins:
<style type="text/css">
.topbar { margin-left: 150px; }
</style>