[JQuery] 如何取得父節點的id (How to get the id of parent DOM)

HTML：

< td id="1">


買大誠1【帳號：mainword1】
尚未綁定


< /td>

JQuery:

$(".clsTeacherUserName").change(function () {
    var id = $(this).parent().attr("id");  //id = 1
});

Refrence:  http://stackoverflow.com/questions/545978/finding-the-id-of-a-parent-div-using-jquery
JQUERY-parent: http://api.jquery.com/parent/