<html>
<div id="b">
    Press a key!
    <input id="a">
    <iframe></iframe>
</div>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
	testRunner.waitUntilDone();
}

a.addEventListener("change", function() { 
    b.innerHTML = "PASS";

	if (window.testRunner)
	    testRunner.notifyDone();
});

a.addEventListener("keyup", function() {
    var e = document.createEvent("KeyboardEvent");
    e.initKeyboardEvent('keydown', true, true, document.defaultView, 'U+0009', 0, false, false, false, false, false);
    a.dispatchEvent(e);
})

document.body.offsetTop;
a.focus();

if (window.testRunner)
    eventSender.keyDown('a');
</script>
</html>