KO local persistence

persistlocal.js

var persistLocal = function(obj, storeKey, attrs){
    var fromLocal = $.parseJSON(localStorage.getItem(storeKey)||'{}');
    $.each(attrs.split(' '), function(i, attr){
        obj[attr](fromLocal[attr]);
        obj[attr].subscribe(function(v){
            fromLocal[attr] = v;
            localStorage.setItem(storeKey, JSON.stringify(fromLocal));
        });
    });
};

function User(){

    this.name = ko.observable();
    this.email = ko.observable();
    this.postcode = ko.observable();

    this.password = ko.observable();
    this.confirm_password = ko.observable();

    persistLocal(this, 'user', 'name email postcode');

}