<html>
<script>
if (window.testRunner) {
testRunner.waitUntilDone();
testRunner.setPopupBlockingEnabled(false);
testRunner.dumpAsText();
}
try {
window.open('about:blank', "_blank", "", null);
document.write("success");
} catch (ex) {
document.write("FAIL - caught exception: " + ex);
}
if (window.testRunner) {
testRunner.notifyDone();
}
</script>
<div>This tests that calling window.open() with a null as a fourth parameter does no throw an exception.</div>
</html>