location.href == "about:blank") { return; }
    assert_not_equals(frame1.contentDocument.URL.indexOf('_charset_=windows-1252'), -1,"should see _charset_=windows-1252 in "+frame1.contentDocument.URL);
    t.done();
  });
  form1.submit();
},'_charset_ control sets the expected encoding name.');

async_test(t => {
  frame2.onload = t.step_func_done(() => {
    assert_equals(frame2.contentDocument.URL.split("?")[1], 'foo=&submit=true');
  });
  form2.submit.click();
}, 'The button cannot be setted if it is not