.tab{
    margin:19px auto 0;
	position:relative;
	border-bottom: 0px solid #333;
	width: 935px;
	height: 12px;
}

.tab a{
	color:#000;
}

.tab ul,.tab li{
	margin:0;
	padding:0;
	font-weight:bold;
}

.tab ul{
	position:absolute;
	bottom:-1px;
	margin:0 0 0 -1px;
	border-left:1px solid #dcdcdc;
}

.tab li,.tab li a{
	line-height:2em;
	float:left;
	width:132px;
	height:25px;
}
 
.tab li{
	border-right:1px solid #dcdcdc;
	border-left:none;
	border-top:1px solid #dcdcdc;
	border-bottom:1px solid #dcdcdc;
	text-align:center;
	list-style:none;
}

.tab li a:hover{
	background:#000000;
	color:#fff;
}

.tab li.menu_op{
	color:#fff;
	background:#000000;
}