W3School TIY
编辑您的代码：
<html> <body> <form id="myForm"> <select id="mySelect"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option> </select> </form> <p>The id of the dropdown list is: <script type="text/javascript"> document.write(document.getElementById("mySelect").id) </script> </p> </body> </html>
查看结果: