how to detect if an video is over js html

1<video src="video.ogv" id="myVideo">
2  video not supported
3</video>
4
5<script type='text/javascript'>
6    document.getElementById('myVideo').addEventListener('ended',myHandler,false);
7    function myHandler(e) {
8        // What you want to do after the event
9    }
10</script>
11