<!DOCTYPE html>
<iframe id="webtest0"></iframe>
<script id="webtest1">
if (window.testRunner)
    testRunner.dumpAsText();
framedoc = frames[0].document.documentElement;
document.body.innerText = 'PASS';
framedoc.innerHTML = '<title>';
framedoc.getElementsByTagName('title')[0].innerText = 'a';
</script>