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<!DOCTYPE html> <html> <body> Birthday: <input type="datetime-local" id="myLocalDate" name="bdaytime"> <p>Click the buttons to display and/or change the value of the name attribute of the local datetime field.</p> <button onclick="display()">Display name</button> <button onclick="change()">Change name</button> <p><strong>Note:</strong> input elements with type="datetime-local" do not show as any datetime field/calendar in Firefox.</p> <script> function display() { var x = document.getElementById("myLocalDate").name; alert("The name of the local datetime field is: " + x); } function change() { var x = document.getElementById("myLocalDate").name = "newDatetimeName"; alert ("The name was changed to: " + x); } </script> </body> </html>