#nav_l {
  width: 132px;
  height: 600px;
  margin: 0px;
  background-color: #FFFFFF;
  float: left;
}

#trenner {
  width: 60px;
  height: 600px;
  margin: 0px;
  background-color: #FFFFFF;
  float: left;
}

#content {
  width: 673px;
  height: 600px;
  margin: 0px;
  background-color: #FFFFFF;
  float: left;
}

#rahmen {
  width: 6px;
  height: 600px;
  margin: 0px;
  background-color: #FFFFFF;
  float: left;
}