knockout无法绑定

[yill0304]

var addressGroup;
function Address() {
var self = this;
self.name = ko.observable();
self.isSaved = ko.observable(false);
self.save = function () {
return function () { alert(1); }
}
};
var otherGroup;
function Other() {
var self = this;
self.pwds = ko.observable();
self.isSaved = ko.observable(false);
self.save = function () {
return function () { alert(2); }
}
}

var model = {

address: ko.observable(),
other: ko.observable()
};

$(function () {
var address = new Address();
addressGroup = ko.validation.group(address);
addressGroup.showAllMessages(false);
model.address(address);

var other = new Other();
otherGroup = ko.validation.group(other);
otherGroup.showAllMessages(false);
model.other(other);
ko.applyBindings(model);
});