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<!DOCTYPE html> <html> <body> <input value="OK"> <p>Click the button below to change the input field to an input button.</p> <button onclick="myFunction()">Try it</button> <p>Internet Explorer 8 and earlier does not support the setAttribute method.</p> <script> function myFunction() { document.getElementsByTagName("INPUT")[0].setAttribute("type", "button"); } </script> </body> </html>