fmpq.com
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> <script> function displayResult(){ var x=document.getElementById("mySelect").form.id; alert(x); } </script> </head> <body> <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> </body> </html>
运行结果