<video poster="content/greenbox.png" controls></video>
<script src=video-test.js></script>
<script>
test("video.getAttribute('poster') == 'content/greenbox.png'");
test("relativeURL(video.poster) == 'content/greenbox.png'");
video.setAttribute('poster', 'content/abe.png');
test("video.getAttribute('poster') == 'content/abe.png'");
test("relativeURL(video.poster) == 'content/abe.png'");
endTest();
</script>