a.info{
    position:relative;
    z-index:24; background-color:#ccc;
    color:#000;
    text-decoration:none
}

a.info:hover{
    z-index:25; 
    background-color:#ff0
}

a.info span{display: none}

a.info:hover span{
    display:block;
    position:absolute;
    top:0px; left:20px; width:170px;
    border:1px solid #D0D0D0;
    background-color:#F5F5F5; color:#000;
    text-align: center;
    padding: 5px;
    z-index:26; 
}