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

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

a.info span{display: none}

a.info:hover span{ /*the span will display just on :hover state*/
    font-size:10px;
    font-family:verdana;
    display:block;
    position:absolute;
    //top:2em; left:2em; 
    margin-top:20px;
    margin-left:10px;
    width:15em;
    border:1px solid #6699cc;
    background-color:#ffffe0; /*#fff;*/
    color:black; /*#6699cc;*/
    text-align: left; //justify;
    font-weight:none;
    padding:5px;
  /*  background-image: url(../im/fond.gif);*/
 }