W3School TIY Editor
W3School 在线教程
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暗黑模式
运行代码
<html> <head> <script type="text/javascript"> function makeReadOnly() { document.getElementById("password1").readOnly=true } </script> </head> <body> <form> <input type="password" id="password1" value="thgrt456" /> <input type="button" onclick="makeReadOnly()" value="Make read-only" /> </form> </body> </html>