.thumbnail, .thumbnail_gewoon{
position: relative;
z-index: 0;
}

.thumbnail {
font-size: 10px;
}

.thumbnail:hover, .thumbnail_gewoon:hover{
background-color: transparent;
z-index: 50;
}

.thumbnail span, .thumbnail_gewoon span{ /*CSS for enlarged image*/
position: absolute;
padding: 0px;
left: 100px;
background: black;
border: 3px solid #110000;
visibility: hidden;
text-align: center;
color: #FFCC99;
}

.thumbnail span img, .thumbnail_gewoon span img{ /*CSS for enlarged image*/
border-width: 0;
padding: 1px;
}

.thumbnail:hover span, .thumbnail_gewoon:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
padding: 2px;
left: 60px; /*position where enlarged image should offset horizontally */
margin-top: -200px;
font-size: 10px;
}