How to parse this object in javascript?

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Javascript

I have a web application,based on MVC, where the object "myMap" is a Map<integer,object> that i populate into Controller and i pass to the View. How can i parse it?
When i run application, i can see this in the view:

<pre lang="Javascript">
var myMap ={0:{'cellId':'15064','creationTime':null,'date':'20120528','direction':'O','id':null,'localAreaCode':'20016','modificationTime':null,'receiver':'URkatij09Kce/Qj0vnEr8s','sender':'VdzW4Vvb7IcjURYCGBs.Is','siteName':'NAVIGLIO PAVESE','time':'222932','version':0},
1:{'cellId':'15064','creationTime':null,'date':'20120528','direction':'O','id':null,'localAreaCode':'20016','modificationTime':null,'receiver':'URkatij09Kce/Qj0vnEr8s','sender':'VdzW4Vvb7IcjURYCGBs.Is','siteName':'CERMENATE','time':'222932','version':0}};
</pre>

How can i get values associated to a key? (for example SiteName value for every key) Thank you

What I have tried:

for (var m in myMap){
      for (var i=0;i<myMap[m].length;i++){

   geocoder.geocode({'address': myMap[m][i]}, function(results, status) {
     if (status === 'OK') {
           resultsMap.setCenter(results[0].geometry.location);
           var marker = new google.maps.Marker({
            map: resultsMap,
            position: results[0].geometry.location
           });

     } else {
       alert('Geocode was not successful for the following reason: ' + status);
     }
   });
   }
 }