JavaScript Get Element by ID
var element = document.getElementById("YourElementId");
Batman
var element = document.getElementById("YourElementId");
document.getElementById("someid");
document.getElementById("some_id");
<p id="YourId">How to use document.GetElementById in HTML</p>
<script>
document.GetElementById('YourId')./* The thing you need to do to your code... Here I want .innerHTML you can take any... */.innerHTML('/* what will it change... */')
</script>
function changeColor(newColor) {
var elem = document.getElementById('para');
elem.style.color = newColor;
}