<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
    if (testRunner.setShouldDecideNavigationPolicyAfterDelay)
        testRunner.setShouldDecideNavigationPolicyAfterDelay(true);
}

function receiveMessage(e)
{
    alert(e.data == 'b' ? 'PASS' : 'FAIL');
    if (window.testRunner)
        testRunner.notifyDone();
}
window.addEventListener("message", receiveMessage, false);

function runtest() {
    var iframe = document.createElement('iframe');
    iframe.src = 'resources/a.html';
    iframe.name = 'framename';
    document.body.appendChild(iframe);

    var form = document.createElement('form');
    form.setAttribute('method', 'post');
    form.setAttribute('action', 'resources/b.html');
    form.setAttribute('target', 'framename');
    document.body.appendChild(form);
    form.submit();
}
</script>
<body onload='runtest()'/>