Creation Methods

<!DOCTYPE html>
<html>
<body>
<style>
div {
  padding:50px;
  background-color: Tomato;
  color: white;
}
</style>
<script>
function myFunction(event) {
var x = document.createEvent("MouseEvent");
x.MouseEvent("mouseover" );
document.getElementById("myDiv").dispatchEvent(x);
}
</script>
<div onmouseover="this.innerHTML += '*';" id="myDiv">*</div>
<br>
 
</body>
</html>