.thumbnail{
positionx: 250;
positiony: 150;
z-index: 0;
}
.thumbnail:hover{
background-color: transparent;
z-index: 50;
}
.thumbnail span{ 
position: absolute;
background-color: lightyellow;
padding: 0px;
left: -1000px;
border: 1px dashed gray;
visibility: hidden;
color: black;
text-decoration: none; font-size:11px;
}
.thumbnail span img{ 
border-width: 0;
padding: 2px;
}
.thumbnail:hover span{ 
visibility: visible;
top: 0;
left: 0; }