protected void btnSave_Click(object sender, EventArgs e)
 {
     if (state == "add")
     {
         HttpCookie AddMsgCookie = new HttpCookie("status");
         AddMsgCookie.Value   = "add";
         AddMsgCookie.Expires = DateTime.Now.AddSeconds(6);
         Response.Cookies.Add(AddMsgCookie);
         BL.AddNewCategory(txtCategoryName.Text, txtCategoryDesc.InnerText);
         Response.Redirect("Categories.aspx");
     }
     else
     {
         HttpCookie UpdateMsgCookie = new HttpCookie("status");
         UpdateMsgCookie.Value   = "update";
         UpdateMsgCookie.Expires = DateTime.Now.AddSeconds(6);
         Response.Cookies.Add(UpdateMsgCookie);
         BL.UpdateCategory(Convert.ToInt32(Request.QueryString["id"]), txtCategoryName.Text, txtCategoryDesc.InnerText);
         state = "add";
         Response.Redirect("Categories.aspx");
     }
 }