<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mstensho@chromium.org">
<link rel="help" href="https://www.w3.org/TR/CSS22/box.html#propdef-margin-left">
<style>
  #container > div { margin-left:50%; height:100px; background:blue; }
</style>
<p>There should be a blue square below.</p>
<div id="container" style="width:456px;">
  <div data-expected-width="100" data-expected-height="100"></div>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script>
  document.body.offsetTop;
  document.getElementById("container").style.width = "200px";
  checkLayout("#container");
</script>