ul{
	margin:0px;
        padding:0px;
	list-style:none;
}

ul  li {
	float:left;
	width:130px;
	height:40px;
	line-height:40px;
	text-align:center;
	font-size:18px;
   
}


ul li a {
		text decoration:none;
		color:white;
		display:block;
				
}
ul li a:hover{
		background-color :green;
		
}
ul li ul li {
	display:none;
}ul li:hover ul li{
	display:block;
}