.scroll_block {
  height:500px;
  overflow:scroll;
}

.article_subtopic {
  background: url(../graphics/blender_icon_32x32.png) no-repeat;
  padding:6px;
  padding-left:40px;
}

.secret_window {
  background:#ffffe8;
  padding:8px;
  border:1px solid gray;
  -moz-border-radius: 5px;
  border-radius: 5px;
  margin:8px;
  margin-left:2em;
  margin-right:2em;
  display:none;
  clear:both;
}