ahi te va un bonito ejemplo ;)
Código HTML:
Ver original
.thumbnail{
position: relative;
z-index: 0;
}
.thumbnail:hover{
background-color: transparent;
z-index: 50;
}
.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
background-color: black;
padding: 5px;
left: -100px;
border: 1px dashed gray;
visibility: hidden;
color: #FFFF00;
text-decoration: none;
}
.thumbnail span img{ /*CSS for enlarged image*/
border-width: 0;
padding: 2px;
}
.thumbnail:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: 0;
left: 10px; /*position where enlarged image should offset horizontally */
}
<a class="thumbnail" href="#thumb"> <img src="http://img74.imageshack.us/img74/7974/inseguridadji1.jpg" width="100px" height="100px" border="0" /> Texto o palabra que quieras que aparezca en la imagen
</span>