jquery判断checkbox组的选中(示例代码)

html:

. 代码如下:

  <tr>
                        <td align="right">
                        </td>
                        <td align="left" colspan="3">
                            <input type="checkbox" class="checkboxlistitem" name="checkitem" value="3" id="slsa_approval" />批准   
                            <input type="checkbox" class="checkboxlistitem" name="checkitem" value="4" id="slsa_noapproval" />不批准
                        </td>
                    </tr>

jquery :

. 代码如下:

$(function () {
    $(".checkboxlistitem").change(    //教师
        function () {
            var $checkvalue = $("input[name='checkitem']:checked").val();
            if ($checkvalue == 3) {
                $("#slsa_approval").attr("checked", true);
                $("#slsa_noapproval").attr("checked", false);
            }
            else {
                $("#slsa_approval").attr("checked", false);
                $("#slsa_noapproval").attr("checked", true);
            }
        });
});

通过值的判断:

. 代码如下:

 var checkcheckbox = $("#slsa_approval").attr("checked");
        if (checkcheckbox == true) {
            auditstate = "3";
        } else {
            auditstate = "4";
        }