0",
      "13:00:00",
      "13:00:00.0",
      "13:00:00.00",
      "13:00:00.000"],
    "a valid time string representing 1pm");
} , "stepUp on step value hour  ");
test(function(){
  _StepTest.value = "12:00";
  _StepTest.step = "3600";
  _StepTest.stepDown();
  assert_in_array(
    _StepTest.value,
    [
      "11:00",
      "11:00:00",
      "11:00:00.0",
      "11:00:00.00",
      "11:00:00.000"],
    "a valid time string representing 11am");
} , "stepDown on step value hour ");

test(function(){
  _S