// TODO: PreCache images here var obj = document.getElementById('obj1') window.rotator = new Rotator(obj, 150, 16); rotator.setCenter({ x: 600, y: 400 }); rotator.hookEvent('rotate', function(_evtArgs) { var ri = _evtArgs.RotationIndex; this.getElement().className = 'rotation' + ri; }); rotator.rotateTo(0);