);
  assert_false(multiple3.checked, "multiple3 not checked");
  assert_false(multiple3.matches(":checked"), "multiple2 not :checked");

  multiple1.checked = true;
  assert_true(multiple1.checked, "multiple1 checked [after multiple1 checked]");
  assert_true(multiple1.matches(":checked"),
      "multiple1 IS :checked [after multiple1 checked]");
  assert_false(multiple2.checked, "multiple2 not checked [after multiple1 checked]");
  assert_false(multiple2.matches(":checked"),
      "multiple2 not :checked [