<!doctype html>
<link rel="help" href="https://html.spec.whatwg.org/multipage/obsolete.html#attr-body-bgcolor">
<link rel="match" href="body-bgcolor-attribute-change-ref.html">
<body bgcolor="yellow">
  Passes if the background is green.
</body>
<script>
  document.body.offsetTop;
  document.body.setAttribute("bgcolor", "green");
</script>
