body {
  margin: 0px;
  padding: 0px;
  background-color: #99b3cc;
  font: .75em verdana;
  line-height: 1.2;
}

h3 {
  margin: 0px;
  padding: 0px;
}

a {
  text-decoration: none;
  color: #00c;
}
  
a:visited {
  color: #00c;
}

a:hover {
  color: #f00;
}

#nav {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 25500;
  width: 220px;
  background-color: #fff;
  border: 1px solid #000;
  padding: 10px;
}

body > div#nav {
  position: fixed;
}

#top_ad {
  position: absolute;
  top: 10px;
  left: 100px;
  z-index: 25500;
}

body > div#top_ad {
  position: fixed;
}

#bottom_ad {
  position: absolute;
  bottom: 0px;
  left: 100px;
  z-index: 25500;
}

body > div#bottom_ad {
  position: fixed;
}

#about {
  display: none;
  position: absolute;
  top: 10px;
  right: 220px;
  background-color: #fff;
  border: 1px solid #000;
  z-index: 25500;
}

body > div#about {
  position: fixed;
}