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<html><body>A hidden input field:<input type="hidden" id="myInput" name="country" value="Norway"><p>Click the buttons to display and/or change the value of the value attribute of the hidden input field.</p><button onclick="display()">Display value</button><button onclick="change()">Change value</button><script>function display() { var x = document.getElementById("myInput").value; alert("The value of the hidden input field is: " + x);}function change() { var x = document.getElementById("myInput").value="USA"; alert ("The value was changed to: " + x);}</script></body></html>