ul#topnav {
	margin: 0;
	padding: 0;
	list-style: none;
	float: left;
	width: 850px;
}
ul#topnav li{
	margin: 0;
	margin-left: 1px;
	padding: 0;	
	overflow: hidden; 
	float: left;
	height:40px;
	cursor:pointer;
}
ul#topnav a, ul#topnav span { 
	margin: 0px;
	padding: 10px 25px;
	float: left;
	text-decoration: none;
	color: #fff;
	background: url(a_bg.gif) repeat-x;
	clear: both;
	height: 20px;
	line-height: 20px; 
}
ul#topnav a{ 
	color: #555;
	background-position: left bottom;
}
ul#topnav span{ 
	background-position: left top;
}