JAVASCRIPT ONMOUSEOVER EVENT
Run 
<html>
    <head>   
        <title>JavaScript onmouseover Event</title>
        <script>
            function over() {
               document.write("Mouse Over");
            }           
        </script>      
    </head>
    <body>
        <h2 onmouseover="over()">Hover mouse here!</h2>
    </body>
</html>