td.Bopomofo:hover {background: #8FA}
td.Nd:hover, td.Nl:hover, td.No:hover {background: #F88} /* number */
td.Sc:hover {background: #F8C} /* currency */
td.Bopomofo:hover {background: #8FA}
td.Nd:hover, td.Nl:hover, td.No:hover {background: #F88} /* number */
td.Sc:hover {background: #F8C} /* currency */