protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                GridView1.DataSource = StoreBusinessLogic.GetAVListSup();
                GridView1.DataBind();
            }
            if (Session["sign"].ToString() == "")
            {
                Response.Redirect("~/LoginNew.aspx");
            }
            Boolean results = empauthentication.SupAuthentication(Session["sign"].ToString());

            if (results == false)
            {
                Response.Redirect("~/LoginNew.aspx");
            }
        }