*{
		padding:0px;
		margin:0px;
	}
	
	.header{ 
		margin:auto;
		width:80%;
		font-family:Arial,Helvetica,sans-serif;
		text-align: center;
	}
	
	.header ul{
		width:100%;
	}

	ul,ol {
		list-style:none;
	}

	.nav li{
	width:25%;	
	}
	.nav li a {
		background-color:#000;
		color:#fff;
		text-decoration:none;
		padding:10px 15px;
		display:block;
	}
	
	.nav li a:hover{
		background-color:#434343;
	}

	.nav > li {
		float:left;
	}

	.nav li ul{
		display:none;
		position: absolute;
		min-width: 140px;

	}

	.nav li:hover > ul {
		display:block;
	}

	.nav li ul li{
		position: relative;
		width:20%;	
	}