div#main_navi a {
height: 25px;
width: 300px;
overflow: hidden;
background-repeat: repeat-y;
margin-bottom: 1px;
margin-right:20px;
}

div#main_navi a:hover {
background-position: 0px 25px;
}

a#navi-loesung {
background-image: url(../static_img/navi/loesung.jpg);
}

a#navi-marktanf {
background-image: url(../static_img/navi/marktanforderung.jpg);
}

a#navi-produktident {
background-image: url(../static_img/navi/produktidentifikation.jpg);
}

a#navi-kompetenz {
background-image: url(../static_img/navi/kompetenz.jpg);
}