Stop recursive function at nth level?

Question

I'm trying to stringify the mousewheel event using the following function. The function works fine in other instances, but in this instance I'm getting Maximum call stack size exceeded. How can I make it only return properties/methods to the n^th level?

function cloneAsObject(obj) {
    if (obj === null || !(obj instanceof Object)) {
        return obj;
    }
    var temp = (obj instanceof Array) ? [] : {};
    for (var key in obj) {
        temp[key] = cloneAsObject(obj[key]);
    }
    return temp;
}

Answer 1

Edit: The original answer below leads to an error:

Uncaught TypeError: Converting circular structure to JSON

So the level of recursion is not the problem (as Alexandre Dupriez already commented). Here is a function that returns a simple string representation, ignoring nested objects and functions (see this answer Converting circular structure to JSON):

function simpleStringify (obj){
    var simpleObject = {};
    for (var prop in obj ){
        /*if (!obj.hasOwnProperty(prop)){
            continue;
        }*/
        if (typeof(obj[prop]) == 'object'){
            continue;
        }
        if (typeof(obj[prop]) == 'function'){
            continue;
        }
        simpleObject[prop] = obj[prop];
    }
    return JSON.stringify(simpleObject);
}

Original answer: Just count the recursion level with a second argument. For example:

function cloneAsObject(obj, level) {
    if (level >= 100 || obj === null || !(obj instanceof Object)) {
        return obj;
    }
    var temp = (obj instanceof Array) ? [] : {};
    for (var key in obj) {
        temp[key] = cloneAsObject(obj[key], level + 1);
    }
    return temp;
}