ment.getElementById(contentId);
        var marginLeftVal = getComputedStyle(contentEl).getPropertyValue('margin-left');
        if (assertTrue) assert_equals(marginLeftVal, "2px");
        else assert_not_equals(marginLeftVal, "2px");
      }

      t1.step(function() {
        make_assert("content1", true);
        t1.done();
      });

      t2.step(function() {
        make_assert("content2", false);
        t2.done();
      });

    </script>
</body>
</html>
