assertEquals(1, second.size());
assertEquals("second", second.attr("id"));
GQuery third =$("#parent > div:nth-child(3)", e);
assertEquals(1, third.size());
assertEquals("third", third.attr("id"));
//test nth-child with function
GQuery secondAndFourth = $("#parent > div",e).filter(":nth-child(2n)");
assertEquals(2, secondAndFourth.size());
assertEquals("second", secondAndFourth.eq(0).attr("id"));