Problema para leer un Array con JavaScript[No resuelta]

 
   <script>
       
       function getParameterByName(name) {
    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
    results = regex.exec(location.search);
    return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}   
      
</script>
 
function calcRoute() {
var bounds = new google.maps.LatLngBounds;
var markersArray = [];
var origin='Justiniano Posse 1236, Córdoba, Argentina';
var destination='General Paz 1151, Rio Cuarto, Argentina';  

  var waypts = new Array();
            var pointsArray = getParameterByName('points');
            for (var i = 0; i < pointsArray.length; i++) {
                if (pointsArray[i].value != '') {
                    waypts.push({
                        location: pointsArray[i].value,
                        stopover: true
                    });
                }
            }
  
var request = {
        origin: origin,
        destination: destination,
        waypoints: waypts,

  travelMode: google.maps.TravelMode.DRIVING
  };
  directionsService.route(request, function(response, status) {
      if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
      }
      });
}