.node_is_hidden,
.node_is_hidden *,
a.node_is_hidden,
a.node_is_hidden:link,
a.node_is_hidden:active {
  text-decoration: line-through;
  /* Set opacity for good little browsers. */
  opacity: 0.7;
  /* Trigger hasLayout in IE so that opacity can be set on inline elements. */
  zoom: 1;
  /* Set opacity in IE 8 */
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=70)";
  /* Set opacity in dinosaur IE (<= 7) */
  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=70);
}

/* support for outline designer */
table#book-outline .node_is_hidden * {
  opacity: .8;
}

table#book-outline .node_is_hidden:hover * {
  opacity: 1;
  text-decoration: none;
}