.thumbnail_1{
position: relative;
z-index: 0;
//box-shadow:5px 2px 6px #000;
}

.thumbnail_1:hover{
background-color: transparent;
z-index: 50;
}

.thumbnail_1 span{ /*CSS for enlarged image*/
position: absolute;
background-color: lightyellow;
//padding: 5px;
left: -1000px;
border: 1px dashed gray;
visibility: hidden;
color: black;
text-decoration: none;
}

.thumbnail_1 span img{ /*CSS for enlarged image*/
border-width: 0;
//padding: 2px;
}

.thumbnail_1:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: 0;
left: 60px; /*position where enlarged image should offset horizontally */

}