[jQuery] processing json object

[jQuery] processing json object


how can I process values from json object without having to use
indivual reference names?
using json:
( {"Records": [ {"firstname":"Nancy","lastname":"Davolio"} ],
"RecordCount":"1" } )
instead of :
$.ajax({ ......
success: function(json, status) {
if(json.Records){alert("Records="+json.Records[0].firstname );}
...
is there a way to numerically reference values --something like :
$.ajax({ ......
success: function(json, status) {
if(json.Records){alert("Records="+json.Records[0].0);}
...
only it should work :)
thanks in advance