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<!DOCTYPE html> <html> <body> <form action="form_action.asp"> A hidden field:<input type="hidden" id="myInput" name="country" value="Norway"><br> <input type="submit" value="Submit"> </form> <p>Notice that the hidden field above is not shown to a user.</p> <p>Submit the form to see the value of the name and value attribute of the hidden input field, as received input.</p> <p>Click the "Try it" button to change the value from "Norway" to "USA".</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myInput").value = "USA"; document.getElementById("demo").innerHTML = "The value of the value attribute was changed. Try to submit the form again."; } </script> </body> </html>