小编Est*_*uez的帖子

body {
  background-color: #444;
  margin-top: 0;
  margin-bottom: 0;
}

#wrapper {
  width: 1005px;
  margin: 0 auto;
  padding: 0;
  overflow: auto;
}

#leftcolumn {
  width: 250px;
  background-color: #111;
  padding: 0;
  margin: 0;
  display: block;
  border: 1px solid white;
  position: fixed;
}

#rightcolumn {
  width: 750px;
  background-color: #777;
  display: block;
  float: left;
  border: 1px solid white;
}

<div id="wrapper">
  <div id="leftcolumn">
  </div>
  <div id="rightcolumn">
  </div>
</div>