.nav {height: 51px;}
#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: 8px;}
  
* 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: 0px; }
    
/* Essentials - configure this */
#nav ul { width: 170px; overflow: hidden;}
#nav ul ul { left: 131px; }


/* Everything else is theming */ 
#nav {height: 51px; }


#nav *:hover { background-color: none; }
#nav a { color: #FF6600; font-size: 12px;  line-height: 1; font-weight:bold; margin:0;} /*tap與tap間的距離*/
  #nav li.hover a {  }		/*background-color: #5E5A5A; */
  #nav ul { top: 51px; background: url(../image/gimg/submenu_bg.png) repeat-y; }	/*控制子菜單彈出的高度*/
  #nav ul li{position:relative; z-index:1; background: #FFFF99 !important; display:block; }
  #nav ul li a { display:block; color:#FF6600; line-height:20px;}	/*sub menu*/
  #nav ul a.hover { color:#FFF; }
  #nav ul a { border-bottom: 1px dashed #CCCCCC; border-right: none;}
#opacity: 0.9; filter: alpha(opacity=90); 
/* #nav ul a { border-bottom: none; } - I also needed this for IE6/7 */