Backbone offline store

Hello Guys,

I need make in backbone.js two collections ( products and orders ) with two views on two pages. First will be products, this collection is _.groupedBy collection by the category name from json, in beside of each this product is + button for add to ( orders collection ) basket. Second page is for orders view, there is button for submit order ( this button will only change status in order ). Whole this app I need function offline ( localStorage,html5 or offline plugin for this ) and will automatic store data to server when is online.

Can help me somebody with this ?