function updateCalendar(refdate) {
	var url = "http://residency.pathology.umn.edu/applications/googlecalendarparser/gcalfeed.php?refdate="+refdate;

	var calendar_feed = $('calendar_feed');

	var calfeedfx = new Fx.Styles(calendar_feed, {
			duration: 200,
			transition: Fx.Transitions.Quad.easeOut
	});

	calfeedfx.start( {'background-color': ['#ffffff', '#fffadb']} );

	var calendar_feed_list = $('calendar_feed_list').empty();
	var calendar_feed = $('calendar_feed').addClass('ajax_loading');

	/**
	 * The simple way for an Ajax request, use onRequest/onComplete/onFailure
	 * to do add your own Ajax depended code.
	 */
	new Ajax(url, {
		method: 'post',
		update: $('calendar_feed'),
		onComplete: function() {
			calfeedfx.start( {'background-color': ['#fffadb', '#ffffff']} );
			calendar_feed.removeClass('ajax_loading');
			}
	}).request();
}