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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>素材8网教程(study.sucai8.cn)</title> <script> function setResult(){ document.getElementById("email").readOnly=true; } </script> </head> <body> <form> Email: <input type="text" id="email"> </form> <button type="button" onclick="setResult()">设置只读</button> </body> </html>
运行结果