#screen{
	position:relative;
	margin:0;
	padding:0;
}

	
#sections{
  margin:0;
  padding:0;
  text-align:center;
	overflow:hidden;
	width:900px;
	
}

#sections ul{
	width:5200px;
	list-style-type:none;
	margin:0;
	padding:0;	
}

#sections li{
	float:left;
	width: 260px;
  height:90px	
	margin:0;
	padding:0;
	font-size:15px;
}