#popup {color:#000; background-color: #fff; width: 35px; }
#popup a span{
    display: none;
}

#popup a:hover {
    background-color: #ffffff;
    text-decoration: none;
    cursor: help;
}

#popup a:hover span{
    display: block;
    position: absolute;
    top: 0px;
    left: 0px;
    width: 0px;
    margin: 0px;
    padding: 10px;
    color: #ffffff;
    font-weight: normal;
    background: #fff;
    z-index: 2;
}

#popup a:hover span img {
    border: 1px solid #000;
}