code: function _getTimeLeft(timeout) {
          return Math.ceil(timeout._idleStart + timeout._idleTimeout - Date.now());
        }
docs: Get time left
  
  2014-11-6
  http://stackoverflow.com/questions/3144711/javascript-find-the-time-left-in-a-settimeout
  Courtesy of Fluffy
  
  @param timeoutObject
  
  @return integer