รบกวนช่วยแก้ไขโค้ด JavaScript Check Radio ให้หน่อยครับ

  btnSaveShippingMethodClick: function() {
    var shipping_methods = document.getElementsByName("shipping_mod_sel"); 
    var shipping_method = null;
    $each(shipping_methods, function(method) {
      if (method.type == 'radio') {
        if (method.checked) {
          shipping_method = method.value;
        }
      } else if (method.type == 'hidden') {
        shipping_method = method.value;
      }
    });
    
    if (shipping_method != null) {
      var params = {
        action: 'save_shipping_method',
        shipping_mod_sel: shipping_method,
        shipping_comments: $('shipping_comments').value
      };

foreach ($osC_Shipping->getQuotes() as $quotes) {
osc_draw_radio_field('shipping_mod_sel', $quotes['id'] . '_' . $methods['id'], $osC_ShoppingCart->getShippingMethod('id'));
}

foreach ($osC_Shipping->getQuotes() as $quotes) {
osc_draw_radio_field('shipping_mod_sel_'.$quotes['shipping_store_id'], $quotes['id'] . '_' . $methods['id'], $osC_ShoppingCart->getShippingMethod('id'));
}