• 코드:
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<!DOCTYPE html>
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<html lang="ko">
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​
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<head>
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    <meta charset="UTF-8">
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    <title>HTML Input Attributes</title>
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</head>
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​
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<body>
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​
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    <h1>readonly 속성을 이용한 필드값 수정 제한</h1>
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    <form action="/examples/media/request.php">
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        이름 : <br>
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        <input type="text" name="student_name"><br>
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        학번 : <br>
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        <input type="text" name="student_id"><br>
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        학과 : <br>
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        <input type="text" name="department" value="컴퓨터공학과" readonly><br><br>
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        <input type="submit" value="전송">
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    </form>
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​
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</body>
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​
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</html>