#popup {
    /* Necessary: */
    position: absolute;
    display: none;
    z-index: 10;

    /* Additional styling: */
    max-width: 275px;
    font-size: 10pt;
    background-color: #eee;
    border: 1px solid #000;
    padding: 5px;
    opacity: .90;
    filter: alpha(opacity=90);
  }

  #popup h3{
     font-size: 12pt;
  }