.prhead{border:1px solid gray;background-color:#dddddd;}
.pren{border: 1px solid gray;background-color:#eeeeee;}
.prdu{border: 1px solid gray;background-color:#E2F1FE;}
.prex{border: 1px solid gray;background-color:#CFD9E9}
.klein {font-size: 0.85em; font-weight:normal}