求大神解救！jquery的问题

Question

<tr>
                        <td><input type="checkbox" name="id" onclick="checkedstr()"  value=""></td>
                        <td><?=i+1?></td>
                        <td><?=listobj[i]['name']?></td>
                        <td><?=listobj[i]['sex']?></td>
                        <td><?=listobj[i]['job']?></td>
                        <td><?=listobj[i]['phone']?></td>
                    </tr>

                    <input type="button" id="aaa" value="anniuy" onclick="acc()"/>
                    <script>

        function acc() {

            var len = $("td input[type='checkbox']:checked").length;
            var chk=[];
            for (var ii=0;ii<len;ii++){
                var obj = $("td input[type='checkbox']:checked")[ii];

                var labContent = obj[0].textContent;
                chk.push(labContent);
            }
            $("#uid").val(len);

        }

    </script>
    没有任何效果，求大神帮忙

Answer 1

            var labContent = obj[0].textContent;
                            应该是
            var labContent = obj.textContent;或者obj.value