a.info{
    position:relative; /*this is the key*/
    z-index:24; 
    color:#000;
    text-decoration:none
    }

a.info:hover{
	z-index:25;
	}

a.info span{
display: none
}

a.info:hover span{ /*the span will display just on :hover state*/
	height: 16px;
	overflow: hidden;
    display:block;
    position:absolute;
    bottom:20px; left:1em;
    padding: 2px 4px 2px 4px;
    border:none;
    background: url(../images/fondonombres.png) repeat-x;
    color:#ffffff;
    text-align: center;
    }