How to pagination with backbone.js?

gistfile1.js

var PageModel = Backbone.Model.extend({ });

var PageView = Backbone.View.extend({
  events: {
    'click .other-page': 'open'
  },

  initialize: function() {
    this.models = {};
  },

  open: function(id) {
    var model = this.models[id];
    if (model) {
      this.model = model;
      this.render();
    }
    else {
      var model = new PageModel({ id: id });
      model.bind('change', this.register, this);
      model.bind('change', this.render, this);
      model.fetch();
    }
  },

  register: function(model) {
    this.models[model.get('id')] = model;
    this.model = model;
  }
});