rox_equals(rect1.width.animVal.value, 150, epsilon);
    assert_equals(rect1.width.baseVal.value, 150);

    assert_approx_equals(rect2.width.animVal.value, 100, epsilon);
    assert_equals(rect2.width.baseVal.value, 150);
}

function sample4() {
    assert_approx_equals(rect1.width.animVal.value, 150, epsilon);
    assert_equals(rect1.width.baseVal.value, 150);

    assert_approx_equals(rect2.width.animVal.value, 50, epsilon);
    assert_equals(rect2.width.baseVal.value, 150);
}

function sample5() {
    a