.thumbnail{position:inherit; z-index: 9999;}

.thumbnail span{
	position: absolute;
	background-color: lightyellow;
	padding: 5px;
	left: -1000px;
	border: 1px dashed black;
	visibility: hidden;
	color: black;
	text-decoration: none;
	display: none;
}

.thumbnail:hover span{
	visibility: visible;
	left: 350px;
	top: 85px;
	position: fixed;
	z-index: 9999;
	display: block;
}

.thumbnail span img{border-width: 0; padding: 2px;}