#foto_vorige{
  float:left;
  width: 85px;
  margin-top:100px;
}

#foto_img{
  float:left;
  width:560px;
  text-align:center;
}

#foto_volgende{
  float:left;
  width: 85px;
  margin-top:100px;
}

a img{
  border:0px;
}