#menu_container ul {
    list-style-image:	none;
    list-style-type:	none;
    margin: 			0px;
    padding: 			0px;
}

#menu_container,
#menu_container ul,
#menu_container li a {
	background-image: url('../images/background_menu.png');
}

#menu_container li{
    float:left;
    width:129px;
 	height: 30px;
	overflow: hidden;
}

#menu_container li a {
	background-repeat: no-repeat;
	position: relative;
	z-index: 2;
	display: block;
	text-indent: -9999px;
	width: 100%;
	height: 100%;
	outline: none;
}

#menu_container li a:link,
#menu_container li a:visited {
	background-position: 9999px 9999px;
}

#menu_container ul.home { background-position: 0px 0px; }

#menu_container li.overchainresult a:hover { background-position: 0px -35px; }
#menu_container li.overchainresult a:active { background-position: 0px -35px; }
#menu_container ul.overchainresult li.overchainresult a,
#menu_container ul.overchainresult li.overchainresult a:hover { background-position: 0px -70px; }

#menu_container li.kennisgebieden a:hover { background-position: -129px -35px; }
#menu_container li.kennisgebieden a:active { background-position: -129px -35px; }
#menu_container ul.kennisgebieden li.kennisgebieden a,
#menu_container ul.kennisgebieden li.kennisgebieden a:hover { background-position: -129px -70px; }

#menu_container li.referenties a:hover { background-position: -258px -35px; }
#menu_container li.referenties a:active { background-position: -258px -35px; }
#menu_container ul.referenties li.referenties a,
#menu_container ul.referenties li.referenties a:hover { background-position: -258px -70px; }