ul.azinfo {
    margin: 0px;
    padding-left: 15px;
}

a.azinfo{
    position:relative; /* WICHTIG!!! */
    z-index:24;
    color: red;
    text-decoration:none;
    }

a.azinfo:hover{
    z-index:25;
    color:red;
    text-decoration:none;
    }

a.azinfo span{
    display: none;
    }

a.azinfo:hover span{
    display:block;
    position:absolute;
    top:25px;
    left:30px;
    width:200px;
    padding:5px;
    border:1px solid red;
    color: red;
    text-align: left;
    background:#FFFFFF;
    }