ntById("thebody");
    assert_equals(thebody.id, "thebody");
}, "Ensure that body element is loaded.")

test(function() {
    document.body.style.overflowY = "hidden";
    assert_equals(document.body.style.overflowY, "hidden", "Could not set document.body.style.overflowY to 'hidden'.");
    document.body.style.overflowY = "scroll";
    assert_equals(document.body.style.overflowY, "scroll", "Could not set document.body.style.overflowY to 'scroll'.");
    document.documentElement.style.overflowY = "scroll";
 