循环输出下拉列表中的所有选项 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function displayResult() {
      var x = document.getElementById("mySelect");
      var txt = "All options: ";
      var i;
      for (i = 0; i < x.length; i++) {
        txt = txt + "
        " + x.options[i].text;
      }
      alert(txt);
    }
  </script>
</head>
<body>

  <form>
    你最喜欢的水果:
    <select id="mySelect">
  <option>Apple</option>
  <option>Orange</option>
  <option>Pineapple</option>
  <option>Banana</option>
</select>
  </form>
  <button type="button" onclick="displayResult()">显示所有选项的文本</button>

</body>
</html>
        