/* Basic code - don't modify */
 
#nav { display: block; margin: 0; padding: 0; position: relative; }
#nav li { display: block; list-style: none; margin: 0; padding: 0; float: left; position: relative; }
#nav a { display: block; }
#nav ul { display: none; position: absolute; left: 0; margin: 0; padding: 0; }
* html #nav ul { line-height: 0; } /* IE6 "fix" */
#nav ul a { zoom: 1; } /* IE6/7 fix */
#nav ul li { float: none; }
#nav ul ul { top: 0; }
    
/* Essentials - configure this */

#nav ul { width: 160px; }
#nav ul ul { left: 161px; }

Everything else is theming 
 
#nav { background-color: #a80300; height: 24px; }

#nav *:hover { background-color: none; }

#nav a { border-right: 0px solid white; color: white; font-size: 10px; padding: 0px; line-height: 16px; }

#nav li.hover a { background-color: #580707;}

#nav ul { top: 29px; }

#nav ul li a { background-color: #580707;  padding:6px; }

#nav ul a.hover { background-color: #a80300; }

#nav ul a { border-bottom: 1px solid white; border-right: none; opacity: 0.9; filter: alpha(opacity=90); }

/* #nav ul a { border-bottom: none; } - I also needed this for IE6/7 */