function playdog() {
				Tutz.play('http://ws.utilia.be/workspace/sound/dog.mp3');
			}
			function playpig() {
				Tutz.play('http://ws.utilia.be/workspace/sound/pig.mp3');
			}
			window.onload = function() {
				Tutz.preload('http://ws.utilia.be/workspace/sound/dog.mp3');
				Tutz.preload('http://ws.utilia.be/workspace/sound/pig.mp3');
			}