<!DOCTYPE html>
<iframe></iframe>
<script>
framedoc = frames[0].document.documentElement;
document.body.innerText = 'PASS';
framedoc.innerHTML = '<title style="position:fixed">';
framedoc.getElementsByTagName('title')[0].innerText = 'a';
if (window.testRunner)
    testRunner.dumpAsText()
</script>