#bovenlinks {
  background-attachment:scroll;
  background-color:rgba(0, 0, 0, 0);
  background-image:url(http://praktijkschols.buro210.com/templates/jt002_j25/images/back1.png);
  background-position:100% 100%;
  background-repeat:no-repeat no-repeat;
  background-size:100%;
  float:left;
  height:45%;
  position:relative;
  width:33.3333333%;