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<html><body>Password: <input type="password" id="myPsw"><p>Click the button to set the password field to read-only.</p><p><strong>Tip:</strong> To see the effect, try to type something in the password field before and after clicking the button.</p><button onclick="myFunction()">Set read-only</button><script>function myFunction() { document.getElementById("myPsw").readOnly = true;}</script></body></html>