Mongo: accessing goal properties in XDB with map reduce

mapreduce.js

var map = function m() { 
    for (var p = 0; p < this.Pages.length; p++)
            {
                if(this.Pages[p].PageEvents){
                    for (var e = 0; e < this.Pages[p].PageEvents.length; e++){
                        var key = this.Pages[p].PageEvents[e].Name;
                        var text = this.Pages[p].PageEvents[e].Text;
                        if(text && text.indexOf('=' > -1) && text.indexOf('&' > -1)){
                             var keys = text.split("&");
                             if(keys.length > 0)
                             {
                                 var valueIndex = 1;
                                 if(keys[valueIndex]){
                                     var value = keys[valueIndex].split("=")[1];
                                     if(value > 0)
                                        emit(key, +value);
                                 }
                                 
                             }
                        }                     
                    }            
                }
              }
  }
  
 var reduce = function r(id,docs) {
      return Array.sum(docs);
 }
 
 db.Interactions.mapReduce(map,reduce,{query: { StartDateTime: {
                                                $gte: ISODate("2014-10-01T00:00:00.000Z"),
                                                $lt: ISODate("2015-12-17T00:00:00.000Z")}},
                                       out:"orders"});
    
 db.orders.find()