CSS Library: Horizontal CSS Menus: Here

<style type="text/css">

#modernbricksmenu{
padding: 0;
width: 100%;
background: transparent;
voice-family: "\"}\"";
voice-family: inherit;
}

#modernbricksmenu ul{
font: bold 11px Arial;
margin:0;
margin-left: 40px; /*margin between first menu item and left browser edge*/
padding: 0;
list-style: none;
}

#modernbricksmenu li{
display: inline;
margin: 0 2px 0 0;
padding: 0;
text-transform:uppercase;
}

#modernbricksmenu a{
float: left;
display: block;
color: white;
margin: 0 1px 0 0; /*Margin between each menu item*/
padding: 5px 10px;
text-decoration: none;
letter-spacing: 1px;
background-color: black; /*Default menu color*/
border-bottom: 1px solid white;
}

#modernbricksmenu a:hover{
background-color: gray; /*Menu hover bgcolor*/
}

#modernbricksmenu #current a{ /*currently selected tab*/
background-color: #D25A0B; /*Brown color theme*/ 
border-color: #D25A0B; /*Brown color theme*/ 
}

#modernbricksmenuline{
clear: both;
padding: 0;
width: 100%;
height: 5px;
line-height: 5px;
background: #D25A0B; /*Brown color theme*/ 
}

#myform{ /*CSS for sample search box. Remove if desired */
float: right;
margin: 0;
padding: 0;
}

#myform .textinput{
width: 190px;
border: 1px solid gray;
}

#myform .submit{
font: bold 11px Verdana;
height: 22px;
background-color: lightyellow;
}

</style>

<div id="modernbricksmenu">
<ul>

<li style="margin-left: 1px"><a href="http://www.dynamicdrive.com" title="Home">Home</a></li>
<li><a href="http://www.dynamicdrive.com/new.htm" title="New">New</a></li>
<li id="current"><a href="http://www.dynamicdrive.com/revised.htm" title="Revised">Revised</a></li>
<li><a href="http://tools.dynamicdrive.com" title="Tools">Tools</a></li>    
<li><a href="http://www.dynamicdrive.com/forums/" title="DHTML Forums">Forums</a></li>    
</ul>
<form id="myform">
<input type="text" class="textinput" /> <input class="submit" type="submit" value="Find" />
</form>
</div>

<div id="modernbricksmenuline">&nbsp;</div>