a.showOnFocus {
  height: 1px;
  width: 1px;
  overflow: hidden;
  white-space: nowrap;
  display: block;
}
a.showOnFocus:focus {
  display: inline;
  line-height: 3;
}
a:link,
a:hover,
a:focus,
a:active {
  text-decoration: underline;
}