如何使用select变量推送动作形式？

Question

我想从html中的select中获取价值并将其推送到操作url中。因此，当用户选择某项操作的价值时，购买选项即为选择的价值如果没有使用html的选项，我宁愿使用php。

这是我的测试购买，它不会将buyoption更改为选择变量。。

请帮助

	<form action="<?php echo URLROOT; ?>/trades/trade/buyoption/selloption" method="POST">
    
                <div class="row">
                   
                    <div class="col-md-9 register-right" >
                    
                        <div class="tab-content" id="myTabContent">
                            <div class="tab-pane fade show active" id="home" role="tabpanel" aria-labelledby="home-tab">
                                <h3 class="register-heading">TRADE</h3>
                                <div class="row register-form">
                                   
                                    <div class="col-md-12">
											<label for="buy"><b>YOU SEND:</b></label>
											
                                        <div class="form-group">
                                            
                                            <select class="form-control" name="buyoption" id="buyoption">
                                                <option class="hidden"  selected disabled>Please select what you want to sell</option>
                                                <option value="btc">Bitcoin (BTC)</option>
                                                <option value="ltc">LITECOIN (LTC)</option>
                                                <option value="eur">NATIONAL BANK TRANSFER (EUR/USD/HRK)</option>
                                            </select>
                                                
                                            
                                            
                                        </div>
                                       
										<label for="buy"><b>YOU RECEIVE:</b></label>
										  <div class="form-group">
                                            <select class="form-control" name="selloption" id="buyoption">
                                                <option class="hidden"  selected disabled>Please select what you want receive</option>
                                                <option value="btc">Bitcoin (BTC)</option>
                                                <option value="ltc">Litecoin (LTC)</option>
                                                <option value="eur">NATIONAL BANK TRANSFER (EUR/USD/HRK)</option>
                                            </select>
                                        </div>

    
									
                                        <input type="submit" class="btnRegister"  value="Proceed"/>
                                    </div>
                                </div>
                            </div>
                            
                        </div>
                    </div>
                </div>
    </form>

Answer 1

There must not be multiple elements in a document that have the same id value.

您可以监视elements元素的document事件，并在更改时操纵操作URL。

id

change