简单教程
提交运行
代码编辑器:
<script> function displayResult(){ var x=document.getElementById("mySelect").form.id; alert(x); } </script> <form id="form1"> 选择你最喜欢的水果: <select id="mySelect"> <option>Apple</option> <option>Orange</option> <option>Pineapple</option> <option>Banana</option> </select> </form> <button type="button" onclick="displayResult()">显示所属的表单ID</button>
运行结果: