code: function()
  			{
  				var tweenTime = (new Date()).getTime() / 1000;
  
  				var time = tweenTime - _tweenTime;
  				if (time < 0)
  					time = 0;
  				else if (time > 0.1)
  					time = 0.1;
  				_tweenTime = tweenTime;
  
  				var runInfos = _tweenRunInfo.values();
  				var runInfo;
  				var position;
  				for (var i = 0, l = runInfos.length; i < l; i++)
  				{
  					runInfo = runInfos[i];
  
  					runInfo.time += time;
  
  					position = runInfo.time / runInfo.duration;
  					if (position > 1)
  						position = 1;
  
  					if (!runInfo.tween.updateTween(position))
  						position = 1;
  
  					if (position == 1)
  						TweenRunner.stop(runInfo.tween);
  				}
  			}
docs: Private Static Methods