Tryit Editor v2.9

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

<p>Click the button to create a Hidden Input Field.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var x = document.createElement("INPUT");
    x.setAttribute("type", "hidden");
    document.body.appendChild(x);

    document.getElementById("demo").innerHTML = "The Hidden Input Field was created. However, you are not able to see it because it is hidden (not visible).";
}
</script>

</body>
</html>