protected void extddlSpeciality_SelectedIndexChanged(object sender, EventArgs e)
 {
     if (extddlSpeciality.Text != "NA")
     {
         lblProcedureCode.Visible = true;
         ddlProcedureCode.Visible = true;
         _reportBO = new Bill_Sys_ReportBO();
         DataSet DS = new DataSet();
         DS = _reportBO.GetProcedureCode(txtCompanyID.Text, extddlSpeciality.Text);
         ddlProcedureCode.DataSource     = DS;
         ddlProcedureCode.DataValueField = "Code";
         ddlProcedureCode.DataTextField  = "Description";
         ddlProcedureCode.DataBind();
         ListItem objTest = new ListItem();
         objTest.Text  = "--- Select ---";
         objTest.Value = "NA";
         ddlProcedureCode.Items.Insert(0, objTest);
     }
     else
     {
         ddlProcedureCode.SelectedIndex = 0;
         lblProcedureCode.Visible       = false;
         ddlProcedureCode.Visible       = false;
         lblProcedureDesc.Visible       = false;
         lstProcedureDesc.Visible       = false;
     }
 }