点击运行
<html> <body> <form id="myForm"> <select id="mySelect"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option> </select> </form> <p>这个下拉列表的 id 是： <script type="text/javascript"> document.write(document.getElementById("mySelect").id) </script> </p> </body> </html>
运行结果
