div .help {
    display: table-cell;
    position: relative;
    z-index: 0;
}
div .help:hover {
    background-color: transparent;
    z-index: 50;
}
div .help span {
    position: absolute;
    background-color: 5c5c5c;
    padding: 10px;
    left: -1000px;
    visibility: hidden;
    color: white;
    text-decoration: none;
}
div .help:hover span {
    visibility: visible;
    top: 0;
    left: 30px;
    width: 200px;
}