Google map Get direction api 8 way point limit

googleapi.js

calcRoute : function (batches, directionsService, directionsDisplay) {
	var combinedResults;
	var unsortedResults = [{}]; // to hold the counter and the results themselves as they come back, to later sort
	var directionsResultsReturned = 0;
	
	for (var k = 0; k < batches.length; k++) {
		var lastIndex = batches[k].length - 1;
		var start = batches[k][0].location;
		var end = batches[k][lastIndex].location;
		
		// trim first and last entry from array
		var waypts = [];
		waypts = batches[k];
		waypts.splice(0, 1);
		waypts.splice(waypts.length - 1, 1);
		
		var request = {
			origin : start,
			destination : end,
			waypoints : waypts,
			travelMode : window.google.maps.TravelMode.WALKING
		};
		(function (kk) {
			directionsService.route(request, function (result, status) {
				if (status == window.google.maps.DirectionsStatus.OK) {
					
					var unsortedResult = {
						order : kk,
						result : result
					};
					unsortedResults.push(unsortedResult);
					
					directionsResultsReturned++;
					
					if (directionsResultsReturned == batches.length) // we've received all the results. put to map
					{
						// sort the returned values into their correct order
						unsortedResults.sort(function (a, b) {
							return parseFloat(a.order) - parseFloat(b.order);
						});
						var count = 0;
						for (var key in unsortedResults) {
							if (unsortedResults[key].result != null) {
								if (unsortedResults.hasOwnProperty(key)) {
									if (count == 0) // first results. new up the combinedResults object
										combinedResults = unsortedResults[key].result;
									else {
										// only building up legs, overview_path, and bounds in my consolidated object. This is not a complete
										// directionResults object, but enough to draw a path on the map, which is all I need
										combinedResults.routes[0].legs = combinedResults.routes[0].legs.concat(unsortedResults[key].result.routes[0].legs);
										combinedResults.routes[0].overview_path = combinedResults.routes[0].overview_path.concat(unsortedResults[key].result.routes[0].overview_path);
										
										combinedResults.routes[0].bounds = combinedResults.routes[0].bounds.extend(unsortedResults[key].result.routes[0].bounds.getNorthEast());
										combinedResults.routes[0].bounds = combinedResults.routes[0].bounds.extend(unsortedResults[key].result.routes[0].bounds.getSouthWest());
									}
									count++;
								}
							}
						}
						directionsDisplay.setDirections(combinedResults);
					}
				}
			});
		})(k);
	}
}

reference
http://lemonharpy.wordpress.com/2011/12/15/working-around-8-waypoint-limit-in-google-maps-directions-api/