void CustomerCheck()
 {
     objService = new ServeAtDoorstepService();
     DataTable dt = objService.AvailableCustomer(txtUsername.Value.ToString().Trim());
     if (dt.Rows.Count == 0 && txtUsername.Value.ToString().Trim() != "")
     {
         intCustomerAvail = 0;
         //checkUser.Visible = true;
         //imgAvailable.Visible = true;
         //imgNotAvailable.Visible = false;
     }
     else
     {
         intCustomerAvail = 1;
         //imgAvailable.Visible = false;
         //imgNotAvailable.Visible = true;
     }
 }