Quantity::createJSOnchange

protected function createJSOnchange($id, $price)
{
	$price = roundEx(floatval($price), SALE_VALUE_PRECISION);
	return "BX.onCustomEvent('onDeliveryExtraServiceValueChange', [{'id' : '".$id."', 'value': this.value, 'price': this.value*parseFloat('".$price."')}]);";
}