s(document.getElementById('chkSupportAttribute').min, "01:01:01.001")}
  , "max attribute support on input element");
test(function(){assert_equals(document.getElementById('chkSupportAttribute').max, "12:12:12.012")}
  , "min attribute support on input element");
test(function(){assert_equals(document.getElementById("chkSupportAttribute").step, "600")}
  , "step attribute support on input element");

/* check step up and down */
var _StepTest = document.getElementById("chkStep");
test(function(){ assert_tru