ul,li{
	margin: 0;
	padding: 0;
	list-style: none;
	}
li{
	float:left;
	background-color: #868686;
	color:#ffffff;
	padding: 5px;
	}
.tabin{
	background-color:#6e6e6e;
}
.contentfirst{
	clear:both;
	background-color:#ffffff;
	width:300px;
	height:200px;
	padding:10px;
	display: none;

}
.content{
	display: block;
}