Using Steven Levithan dateFormat
HTML
<script src="http://stevenlevithan.com/assets/misc/date.format.js"></script>
<span id="date"></span>
JavaScript
var now = dateFormat(new Date(), "dddd, mmmm dS, yyyy, h:MM:ss TT");
// Saturday, June 9th, 2007, 5:46:21 PM
$('#date').append(now);