<html><body><p>本例演示如何将 "onsubmit" 事件分配给 form 元素。</p><p>当您提交表单时，会触发提示文本的函数。</p><form action="/demo/html/action_page.php" onsubmit="myFunction()"> Enter name: <input type="text" name="fname"> <input type="submit" value="Submit"></form><script>function myFunction() { alert("The form was submitted");}</script></body></html>