#main_navigation
{	margin: 0;
	padding: 0}
	
 #main_navigation li
	{	float: left;
		list-style: none;
		font: 12px Tahoma, Arial}

 #main_navigation li a
	{	display: block;
		background: #e3e3e3;
		padding: 5px 10px 5px 10px;
		text-decoration: none;
		border-right: 1px solid white;
		width: auto;
		color: #333;
		white-space: nowrap}

 #main_navigation li a:hover
	{	background: #999;}
		
 #main_navigation li ul
		{	margin: 0;
			padding: 0;
			position: absolute;
			visibility: hidden;
			border-top: 1px solid white}
		
 #main_navigation li ul li
		{	float: none;
			display: inline}
		
 #main_navigation li ul li a
		{	width: auto;
			background: #ccc;}
		
 #main_navigation li ul li a:hover
		{	background: #999;}