Fomatting Date Using Jquery

<span class="date">08-Aug-2012</span>
<span class="date">2012/08/Aug</span>
<span class="date">Monday, August 08, 2012</span>
$(document).ready(function () {
$('span.date').each(function() {
var dateFormat = $(this).text()
var dateFormat = $.datepicker.formatDate('yymm', new Date(dateFormat));
//alert(dateFormat);
$(this).html(dateFormat + "<br>");
});
});