我是 Javascript 世界的新手，我正在嘗試從我的下拉列表中獲取 URL，到目前為止我創建了這個：$(document).ready(function() {  $('select').on('change', function() {    var target = $(this).find(":selected").attr("data-target");    var id = $(this).attr("id");    $("div[id^='" + id + "']").hide();    $("#" + id + "-" + target).show();  });});<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><select name="service" id="service" class="service">  <option>Select a Service</option>  <option value="screen" data-target="devices" id="screen">Screen Replacement</option>  <a href="#" data-acyear="2019/2020" class="acYearChooser active">2019/2020</a>  <option value="comp" data-target="comp" id="comp">Computer Work</option>  <option value="misc" data-target="misc" id="misc">Miscellaneous</option></select><div style="display:none" id="service-devices">  <select name="devices" id="devices" class="devices">    <option>Select a device</option>    <option value="iphone" data-target="iphones" id="iphone">iPhone</option>    <option value="ipad" data-target="ipads" id="ipad">iPad</option>    <option value="android" id="android">Android</option>  </select>  <div style="display:none" id="devices-iphones">    <select name="iphone" id="iphone" class="iphone">      <option></option>      <option value="iphone6" id="iphone6">iPhone 6</option>      <option value="iphone6plus" id="iphone6plus">iPhone 6 Plus</option>      <option value="iphone5s" id="iphone5s">iPhone 5S</option>      <option value="iphone5c" id="iphone5c">iPhone 5C</option>      <option value="iphone5" id="iphone5">iPhone 5</option>      <option value="iphone4s" id="iphone4s">iPhone 4S</option>      <option value="iphone4" id="iphone4">iPhone 4</option>    </select>  </div>我想要實現的是從每個下拉列表中獲取 URL，以便我可以發送該 URL，輸出如下service=screen_replacment&device=iphone&model=iphone6有人可以幫忙嗎？抱歉，如果這是一個新手問題