.test {  background-image: url(../bilder/steine_oben.gif); background-repeat: no-repeat}
.bild_unten {  background-image: url(../bilder/unten.jpg); background-repeat: no-repeat; clip:  rect(  0px )}
.unternehmen {  background-image: url(../bilder/unternehmen/top_u.gif); background-repeat: no-repeat}