1.9以后Jquery不支持attr啦！



<script type="text/javascript">
    $(function () {
        $("#chckAll").click(function () {                   
            //$("input[name='chckList']").attr("checked", $("#chckAll").attr("checked"));   失败！
            var flag = $(this).prop("checked");
            alert(flag);
            if (!flag) {
                $("[name = 'chckList']:checkbox").attr("checked", false);
            }
            else {
                $("[name = 'chckList']:checkbox").attr("checked", true);
            }        

        });

    });
</script>