find key in nested json object

1function getObject(theObject) {
2    var result = null;
3    if(theObject instanceof Array) {
4        for(var i = 0; i < theObject.length; i++) {
5            result = getObject(theObject[i]);
6            if (result) {
7                break;
8            }   
9        }
10    }
11    else
12    {
13        for(var prop in theObject) {
14            console.log(prop + ': ' + theObject[prop]);
15            if(prop == 'id') {
16                if(theObject[prop] == 1) {
17                    return theObject;
18                }
19            }
20            if(theObject[prop] instanceof Object || theObject[prop] instanceof Array) {
21                result = getObject(theObject[prop]);
22                if (result) {
23                    break;
24                }
25            } 
26        }
27    }
28    return result;
29}
30