clone一行div tr 每次增量赋值

$("#add_tan").click(function () {
    num++;
    $("tbody tr.tab_xue").eq(0).clone(true).attr("id", "tab_xue" + num).appendTo("tbody.tbody_xue");
    $("tr.tab_xue" +num+"").each(function() {//循环克隆的新行里面的td
        $(this).find("#chip_no_child" +(num-1)+"").attr("id", "chip_no_child" + (num+1));
        // $(this).find("input[name='chip_no_child0']").attr("id", "chip_no_child" + num).attr("name", "chip_no_child" + num);
        $(this).find("input[name='dog_name_child0']").attr("id", "dog_name_child" + num).attr("name", "dog_name_child" + num);
        $(this).find("input[name='dog_birthday_child0']").attr("id", "dog_birthday_child" + num).attr("name", "dog_birthday_child" + num);
        $(this).find("input[name='hair_color_child0']").attr("id", "hair_color_child" + num).attr("name", "hair_color_child" + num);
        $(this).find("input[name='certificate_no0']").attr("id", "certificate_no" + num).attr("name", "certificate_no" + num);
    });
});