code: function (rotation) {
  		var rotationStyle = {},
  			cssTransformKey = isIE ? '-ms-transform' : isWebKit ? '-webkit-transform' : isFirefox ? 'MozTransform' : isOpera ? '-o-transform' : '';
  
  		rotationStyle[cssTransformKey] = rotationStyle.transform = 'rotate(' + rotation + 'deg)';
  		css(this.element, rotationStyle);
  	}
docs: Set the rotation of an individual HTML span