.containerdiv {
    border: 0;
    float: left;
    padding-bottom: 0.5em;
    position: relative;
    } 

  .lijst {
    list-style: none;
    margin: 0 0 8px 0;
    padding: 0;
    text-align: left;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    }

  .lijst a {
    color: #00437E;
    display: block;
    padding: 1px 0 1px 10px;
    text-decoration: none;
    }

  .lijst .a:hover {
    background-color: #E8E8E8;
    }

  .lijst .active {
    background-color: #C4E8EC; 
    }
  
  .markering {
    bottom: -8px;
    position: absolute;
    right: 24px;
    }

  #overlay-image {
    border: 0;
    position: absolute;
    top: 0;
    right: 0;
    opacity:0;
    }