{volist name="arr" id="v"}
        <tr id="{$v.id}">
            <td><input type="checkbox" name="check" value="{$v.id}"></td>
            <td>{$v.id}</td>
            <td fd="user"><span>{$v.user}</span></td>
            <td>{$v.pwd}</td>
            <td>{$v.new_name}</td>
            <td>{$v.time}</td>
            <td>{$v.zt}</td>
        </tr>
        {/volist}

<script>
        $(document).on('dblclick','span',function(){
            var txt=$(this).text();
            $(this).parent().html("<input type='text' value='"+txt+"' class='sp'>");
        });
        $(document).on('blur','.sp',function(){
            var val = $(this).val();
            var id =$(this).parents('tr').attr('id');
            var fd =$(this).parents('td').attr('fd');
            var obj=$(this);
            $.ajax({
                type: "GET",
                url: "{:url('index/upd')}",
                data: {
                    val:val,
                    id:id,
                    fd:fd
                },
                success: function(msg){
                    if(msg==1)
                    {
                        obj.parent().html("<span>"+val+"</span>");
                    }
                }
            });
        });
    </script>

public function upd()
    {
        $fd = input('get.fd');
        $arr[$fd] = input('get.val');
        $arr['id'] = input('get.id');
        $res = Db::table('www')->update($arr);
        if ($res) {
            return 1;
        } else {
            return 0;
        }
    }