function onRotationChange() {

		quaternion.setFromEuler( rotation, false );

	}
@author mrdoob / http://mrdoob.com/
@author mikael emtinger / http://gomo.se/
@author alteredq / http://alteredqualia.com/
@author WestLangley / http://github.com/WestLangley
@author elephantatwork / www.elephantatwork.ch