使用选择特定选项时选择选项验证

Question

我为用户选择了选项。当使用选择其他（请注明）时，打开四个输入框，输入只有在使用时才需要验证的指令选择“其他（请注明）”选项。

                             交货指示                                      *                              

        <input name="_D:shippingDeliveryInstructions" value=" " type="hidden"><select id="shippingDeliveryInstructions" name="shippingDeliveryInstructions" class=" ">
            <option selected="" value="">Please select an option
















                                    </option><option value="At back door">
                                        At back door


















                                    </option><option value="At front door">
                                        At front door


















                                    </option><option value="Behind garage">
                                        Behind garage


















                                    </option><option value="In garage">
                                        In garage


















                                    </option><option value="In greenhouse">
                                        In greenhouse


















                                    </option><option value="In shed">
                                        In shed


















                                    </option><option value="In the porch">
                                        In the porch


















                                    </option><option value="Sheltered and out of public view at front of house">
                                        Sheltered and out of public view at front of house


















                                    </option><option value="Sheltered and out of public view at rear of house">
                                        Sheltered and out of public view at rear of house


















                                    </option><option value="Sheltered and out of public view at side of house">
                                        Sheltered and out of public view at side of house


















                                    </option><option value="With any neighbour">
                                        With any neighbour


















                                    </option><option value="With receptionist">
                                        With receptionist







            </option><option value="-1" class="optionother">
                Other (please specify)

        </option></select>


    </li>

            其他（请注明）