code: function validateDoubleTap() {
  		    if(doubleTapStartTime==null){
  		        return false;
  		    }
  		    var now = getTimeStamp();
  		    return (hasDoubleTap() && ((now-doubleTapStartTime) <= options.doubleTapThreshold));
  		}
docs: Returns true if we could be in the process of a double tap (one tap has occurred, we are listening for double taps, and the threshold hasn't past.
  @return Boolean
  @inner