W3School TIY Editor
W3School 在线教程
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暗黑模式
运行代码
<html> <body> <button accessKey="a" id="button1">Click me!</button> <p>AccessKey for button is: <script type="text/javascript"> x=document.getElementById('button1'); document.write(x.accessKey); </script></p> </body> </html>