এইচটিএমএল onmouseover

<!DOCTYPE html>
<html>
<body>

<div
  onmouseover="over(this)"
  style="padding:30px; background:lightgray;">
  মাউস ওপরে আনুন
</div>

<script>
function over(element) {
  element.style.background = "lightgreen";
}
</script>

</body>
</html>