#header_navigation li.refhome a
{
	background:url(../images/menu-top.gif) no-repeat;
	background-position:0px -168px;
	color:transparent;
	display:block;
	width: 97px;
	height: 84px;
}

#header_navigation li.refhome a:hover
{
	background-position:0px -84px;
}