basic mouse over mouse out events in javascript HTML
<!DOCTYPE html>
<html>
<body>
<h1 onmouseover="mouse_here()" onmouseout="mouse_gone()" id="target">Hiding</h1>
<script>
function mouse_here() {
document.getElementById("target").innerHTML = "Peekaboo";
}
function mouse_gone() {
document.getElementById("target").innerHTML = "Hiding";
}
</script>
</body>
</html>