a.tooltip span
{
    display: none;
    padding: 2px 3px;
    margin-left: 8px;
    width: 130px;
}

a.tooltip:hover span
{
    display: inline;
    position: absolute;
    background: #ffffff;
    border: 1px solid #cccccc;
    color: red;
    z-index: 1200;
    font-size: 12px;
    font-weight: bold;
}