I tried the option of students.item["http://www.myurl.com"].comments.data.length. However, the item["http://www.myurl.com"] call is not working.

If I take out the URL from JSON object and write the iterator with students.comments.data, it works.

Here is my code, any help highly appreciated.

 var students = {
       "http://www.myurl.com":{
      "comments":{
       "data" : [ 
                   {
            "id": "123456778",
            "from": {
               "name": "XYZ",
               "id": "1000005"
            },
            "message": "Hey",
            "can_remove": false,
            "created_time": "2012-09-03T03:16:01+0000",
            "like_count": 0,
            "user_likes": false
         }
         ] 
}
}
}

var i=0
var arrayObject = new Array();
alert("Parsing 2:   "+students.item["http://www.myurl.com"].comments.data.length);
for(i=0;i<students.item["http://www.myurl.com"].comments.data.length;i++)
{  
alert("Parsing 1:  "+i);
  arrayObject.push(students.item["http://www.myurl.com"].comments.data[i].id);
  arrayObject.push(students.item["http://www.myurl.com"].comments.data[i].message);
  arrayObject.push(students.item["http://www.myurl.com"].comments.data[i].created_time);
}