Try it Yourself - jQuery event_mouseover

<!DOCTYPE html>
<html>
<head>
<script src="/lib/jquery-1.12.2.min.js"></script>
<script>
$(document).ready(function(){
   $("p").mouseover(function(){
   $("p").css("background-color", "yellow");
   });
   $("p").mouseout(function(){
   $("p").css("background-color", "lightgray");
   });
});
</script>
</head>
<body>

<p>Move the mouse pointer over this paragraph.</p>

</body>
</html>