OnHover HTML5 audio on Safari

OnHover HTML5 audio on Safari

I created a simple nav bar with on-hover mp3/ogg audio playback. It works
on all browsers except Safari on Windows, but judging by the autor it
should work on it too. Can somebody take a look on Mac and let me know is
it working http://webnroll.info/matt
<audio id="aruba" controls preload="auto">
<source src="audio/Aruba.mp3"></source>
<source src="audio/Aruba.ogg"></source>
</audio>
<ul class="top-level">
<li><a href="#" class="palm-tree" id="arubaplay">Link</a></li>
</ul>
JS
window.onload=function(){
// collecting audio files
var aruba = document.getElementById('aruba');
var arubaplay=document.getElementById('arubaplay');
arubaplay.onmouseover=function(){
aruba.play();
return false;
};