div#navigation {
	position: relative;
	width: 734px;
	height: 44px;
	margin: 0 auto;
	padding: 0 0 0 16px;
	background: #FFF url(../images/homepage/nav_main.gif) 0 -22px no-repeat;
	font: normal 11px/13px Arial,Helvetica,sans-serif;
}

div#navigation * {
	margin: 0;
}

ul#nav-one,
ul#nav-one ul { /* all lists */
	padding: 0;
	margin: 0;
	list-style: none;
	line-height: 1;
}

ul#nav-one {
	height: 22px;
}

	ul#nav-one li { /* all list items */
		float: left;
	}

	ul#nav-one li a.top:link,
	ul#nav-one li a.top:visited {
		display: block;
		float: left;
		height: 22px;
		background: #FFF url(../images/homepage/nav_main.gif) -16px 0 no-repeat;
		font-size: 1px;
		line-height: 1px;
		text-indent: -9999em;
		text-decoration: none;
	}
	
		ul#nav-one li.exhibitions a.top:link,
		ul#nav-one li.exhibitions a.top:visited {
			width: 80px;
		}
		
		ul#nav-one li.events_programs a.top:link,
		ul#nav-one li.events_programs a.top:visited {
			width: 56px;
			background-position: -96px 0;
		}
		
		ul#nav-one li.collection a.top:link,
		ul#nav-one li.collection a.top:visited {
			width: 77px;
			background-position: -152px 0;
		}
		
		ul#nav-one li.volunteers a.top:link,
		ul#nav-one li.volunteers a.top:visited {
			width: 75px;
			background-position: -229px 0;
		}
		
		ul#nav-one li.education a.top:link,
		ul#nav-one li.education a.top:visited {
			width: 76px;
			background-position: -304px 0;
		}
		
		ul#nav-one li.museum_store a.top:link,
		ul#nav-one li.museum_store a.top:visited {
			width: 102px;
			background-position: -380px 0;
		}
		
		ul#nav-one li.building a.top:link,
		ul#nav-one li.building a.top:visited {
			width: 66px;
			background-position: -482px 0;
		}
		
		ul#nav-one li.about a.top:link,
		ul#nav-one li.about a.top:visited {
			width: 104px;
			background-position: -548px 0;
		}
		
		ul#nav-one li.contact_us a.top:link,
		ul#nav-one li.contact_us a.top:visited {
			width: 80px;
			background-position: -652px 0;
		}
		
		ul#nav-one li:hover a:link.top,
		ul#nav-one li:hover a:visited.top,
		ul#nav-one li.sfhover a:link.top,
		ul#nav-one li.sfhover a:visited.top {
			background: none;
		}
	
ul#nav-one li ul { /* second-level lists */
	left: -9999em; /* using left instead of display to hide menus because display: none isn't read by screen readers */
	position: absolute;
	top: 22px;
	padding: 3px 0 0; 
	width: 750px;
	text-align: center;
}
	
ul#nav-one li ul * {
	display: inline !important;
	float: none;
}
	
ul#nav-one li ul a:link,
ul#nav-one li ul a:visited {
	color: #666;
	text-decoration: none;
	margin: 0 1px;
	padding: 3px 4px;
}
	
ul#nav-one li ul a:hover,
ul#nav-one li ul a:active {
	color: #000;
}

ul#nav-one li ul li {
	display: inline;
}

ul#nav-one li ul ul { /* third-and-above-level lists */
	margin: -1em 0 0 150px;
}

ul#nav-one li:hover ul,
ul#nav-one li.sfhover ul {
	left: 0;
}

ul#nav-one li:hover ul ul,
ul#nav-one li.sfhover ul ul {
	left: -999em;
}

ul#nav-one li li:hover ul,
ul#nav-one li li.sfhover ul { /* lists nested under hovered list items */
	left: auto;
	margin: -15px 0 0 140px;
}