.umtiagallery{ position: relative; height:auto; }

.thumbnail img{border: 1px solid white; margin: 0 5px 5px 0; }

.thumbnail:hover{ background-color: transparent; }

.thumbnail:hover img{ border: 1px solid blue; }

.thumbnail span{ position: absolute; background-color: #3366FF; padding: 5px; left: -1000px; border: 1px solid gray; visibility: hidden; color: white; text-decoration: none; }

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

.thumbnail:hover span{ visibility: visible; top: 250px; left: 90px; z-index: 50; }