/*
 * display: none をCSS非対応ブラウザにうまくみせる例
 */

h1 {border-bottom: solid thin black;}
h2 {border: none;}
div.topmenu {
  white-space: pre; background: white; 
  line-height: 1.4; position: fixed; top: 4em; width: 5em;
}
div.topmenu+div {
  margin-left: 6em; padding: 1ex;
}
div.topmenu span, div.topmenu hr {
  display: none
}
div.topmenu a {
  padding: 3px; width: 4.5em;
}
div.bottommenu {
  display: none
}