var soundClick = (function () {
var audio = new Audio();
audio.src = 'http://freewavesamples.com/files/Yamaha-TG100-Ocarina-C5.wav';
return function () {
audio.play();
};
})();
<a href="" onclick="soundClick(); return false">Звук!</a>
; <div id="chat" return false">текст сообщения</div>