<!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>