window.addEvent('domready', function() {

	var myTween = new Fx.Tween('diBG',{duration:1000});

	//We can use one Request object many times.
	var req = new Request.HTML({url:'efficiencysb.php',



		onSuccess: function(html) {
			myTween.start('opacity','0').chain(
				function(){
					$('diBG').set('text','');
					$('diBG').adopt(html);
					$('time').set('text','Last updated on');
					myTween.start('opacity','1');
				}
			);

		},
		//Our request will most likely succeed, but just in case, we'll add an
		//onFailure method which will let the user know what happened.
		onFailure: function() {
			$('result').set('text', 'The request failed.');
		}
	});

	$('makeRequest').addEvent('click', function() {
		req.send();
	});

});