#link11 {
     background-image: url(../bilder/beckum.png);
}

#link11:hover {
     background-image: url(../bilder/beckum-hover.png);
}

#link12 {
     background-image: url(../bilder/ewigkeit.png);
}

#link12:hover {
     background-image: url(../bilder/ewigkeit-hover.png);
}