Fixed-width example

CSS

#example03 #header {
  height: 50px;
  width: 700px;
  background-color: #999;
  margin-bottom: 10px;
}

#example03 #nav {
  float: left;
  width: 180px;
  height: 150px;
  background-color: #ccc;
  margin-bottom: 10px;
}

#example03 #content {
  margin-left: 210px;
  height: 150px;
  width: 490px;
  background-color: #ccc;
}

#example03 #footer {
  clear: both;
  height: 50px;
  width: 700px;
  background-color: #999;
  margin-bottom: 10px;
}