<!doctype html>
<title>Custom event on an element in another document</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<script>
test(function() {
  var doc = document.implementation.createHTMLDocument("Demo");
  var element = doc.createElement("div");
  var called = false;
  element.addEventListener("foo", this.step_func(function(ev) {
    assert_false(called);
    called = true;
    assert_equals(ev.target, element);
    as