<!DOCTYPE html>
<html>
<body>
<p>This example uses the addEventListener() method to attach a "mouseover" and "mouseout" event to a h1 element.</p>
<h1 id="demo">Mouse over me</h1>
<script>
document.getElementById("demo").addEventListener("mouseover", mouseOver);
document.getElementById("demo").addEventListener("mouseout", mouseOut);
function mouseOver() {
document.getElementById("demo").style.color = "red";
}
function mouseOut() {
document.getElementById("demo").style.color = "black";
}
</script>
</body>
</html>