Object.prototype.equals = function(b) {
    var a = this;
    for(i in a) {
        if(typeof b[i] == "undefined") {
            return false;
        }
        if(typeof b[i] == "object") {
            if(!b[i].equals(a[i])) {
                return false;
            }
        }
        if(b[i] != a[i]) {
            return false;
        }
    }
    for(i in b) {
        if(typeof a[i] == "undefined") {
            return false;
        }
        if(typeof a[i] == "object") {
            if(!a[i].equals(b[i])) {
                return false;
            }
        }
        if(a[i] != b[i]) {
            return false;
        }
    }
    return true;
};



var obj1 = {name:"A", age:10, subject:[1, 2, {A:1, B:2}]};

var obj2 = {age:10, name:"A", subject:[1, 2, {A:1, B:2}]};

obj1.equals(obj2);
true