private void btn_in_Click(object sender, System.EventArgs e)
        {
            BBSClass bbs = new BBSClass();
            try
            {
                //����listbox�õ�ѡ�еĴ���Ϊ��������Աid
                for(int i=0;i<lbRemainStaffsList.Items.Count;i++)
                {
                    if(lbRemainStaffsList.Items[i].Selected)
                    {
                        bbs.SetupBoardMember(boardid,Int32.Parse(lbRemainStaffsList.Items[i].Value));
                    }
                }
                Response.Redirect("ManageBoardMember.aspx?BoardID="+boardid+"&ClassID="+classid);

            }
            catch(Exception ex)
            {
                UDS.Components.Error.Log(ex.ToString());
                Server.Transfer("../../Error.aspx");
            }
        }