code: function(elem) {
  		// is this already initialized?
  		if ($(elem).data('spriteanim')) return $(elem).data('spriteanim');
  		var spriteanim = new SpriteAnim(elem);
  		$(elem).data('spriteanim', spriteanim);
  
  		return spriteanim;
  	}
docs: Initialize the animation for the element.