.thumbnail{position:relative;z-index:0;}
.thumbnail:hover{background-color:transparent;z-index:50;}
.thumbnail span{position:absolute;background-color:lightyellow;display:block;padding:1px;border:1px solid #000099;visibility:hidden;color:black;text-decoration:none;}
.thumbnail span img{border-width:0;padding:2px;width:auto;height:auto;}
.thumbnail:hover span{visibility:visible;position:absolute;margin:5px 0px 0px 100px;}