.thumbnail{
position: relative;
z-index: 0;
}
.thumbnail:hover{
background-color: transparent;
z-index: 50;
}
.thumbnail span{
position: absolute;
background-color: lightyellow;
padding: 1px;
left: -1000px;
border: 1px dashed gray;
visibility: hidden;
color: black;
text-decoration: none;
}
.thumbnail span img{
border-width: 0;
padding: 2px;
}
.thumbnail:hover span{ /*logo10001.jpg*/
visibility: visible;
top: -15;
left: 100px;
}