W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<html> <head> <script type="text/javascript"> function makeReadOnly() { document.getElementById("text1").readOnly=true } </script> </head> <body> <form> <input type="text" id="text1" value="Hello World!" /> <input type="button" onclick="makeReadOnly()" value="Make read-only" /> </form> </body> </html>