;
  assert_true(children instanceof HTMLCollection);
  var li = document.createElement("li");
  assert_equals(children.length, 4);

  parentNode.appendChild(li);
  assert_equals(children.length, 5);

  parentNode.removeChild(li);
  assert_equals(children.length, 4);
}, "ParentNode.children should be a live collection");
</script>
</html>
