protected void TxtDOJ_TextChanged(object sender, EventArgs e)
 {
     try
     {
         if (TxtRetPeriod.Text != "")
         {
             TxtRetireDt.Text = conn.AddYear(TxtDOJ.Text, TxtRetPeriod.Text);
         }
         TxtRetPeriod.Focus();
     }
     catch (Exception ex)
     {
         ExceptionLogging.SendErrorToText(ex);
     }
 }