Filler Text"
  for (var i=0; i ends up in 
  assert_equals(iframe.contentDocument.body.childNodes[0].textContent, "Filler Text");
  assert_equals(iframe.contentDocument.body.childNodes[0].localName, "i");
  assert_equals(iframe.contentDocument.body.childNodes[0].getAttribute('id'), "a");
  assert_equals(iframe.contentDocument.body.childNodes[1].textContent, "Filler Text");
  assert_equals(iframe.contentDocument.body.childNodes[1].localName, "b");
  assert_equals(iframe.contentDocument.body.childNodes[1].getAttribute('id'), "b");
});