W3School TIY
编辑您的代码：
<html> <body> <h1>What is your name?</h1> <form name="testform" action="http://www.jb51.net/example/hdom/hdom_onsubmit.html" onSubmit="alert('Hello ' + testform.inputfield.value +'!')"> <input type="text" name="inputfield" size="20"> <input type="submit" value="Submit"> </form> </body> </html>
查看结果: