private void actualizarLabelIva(){
        r_con.Connection();
        ResultSet rs=r_con.Consultar("select * from tasas_iva where '"+fecha_factura.getText()+"' between tasa_desde and tasa_hasta");
        try{            
            while(rs.next()){
                if(rs.getString("tasa_tipo").equals("01")){                    
                    jLabel3.setText("IVA "+rs.getFloat("tasa_tasa")+"%");
                }
                if(rs.getString("tasa_tipo").equals("02")){                    
                    jLabel4.setText("IVA "+rs.getFloat("tasa_tasa")+"%");
                }
                if(rs.getString("tasa_tipo").equals("03")){                    
                    jLabel5.setText("IVA "+rs.getFloat("tasa_tasa")+"%");
                }
            }
        }
        
        catch(Exception e){}
        finally{r_con.cierraConexion();}
    }