Tryit Editor v2.7

Edit This Code:
<!DOCTYPE html>
<html>
<body>

<input type="datetime" id="myDatetime"><br><br>

<button onclick="disableBtn()">Disable Datetime Field</button>
<button onclick="undisableBtn()">Undisable Datetime Field</button>

<p><strong>Note:</strong> input elements with type="datetime" are not supported in any of the major browsers, except partially in Safari.</p>

<script>
function disableBtn() {
    document.getElementById("myDatetime").disabled = true;
}

function undisableBtn() {
    document.getElementById("myDatetime").disabled = false;
}
</script>

</body>
</html>