code: function(zoomLevel) {
  
  			var self = this;
  
  			if (zoomLevel == null) {
  				zoomLevel = self.__zoomLevel;
  			}
  
  			self.__maxScrollLeft = Math.max((self.__contentWidth * zoomLevel) - self.__clientWidth, 0);
  			self.__maxScrollTop = Math.max((self.__contentHeight * zoomLevel) - self.__clientHeight, 0);
  
  		}
docs: Recomputes scroll minimum values based on client dimensions and content dimensions.