deepClone_NVD

// Deep clone
function deepCopy(obj) {
    if(obj == null || typeof(obj) !== 'object'){
        return obj;
    }

    var deep = Object.create(obj.constructor.prototype); // or just: var deep = {};

    for(var key in obj){
        deep[key] = deepCopy(obj[key]);
    }
    return deep;
}

// Testing

a = { test: 4, funk : function (){ return 5 } };
b = deepCopy(a);
a.test = 2;
console.log(a); // a has changed value for test
console.log(b); // b still has 4 as a value for test