Simple JavaScript pagination

simple_javascript_pagination.js

config = {
    'items_per_page': 3,
    'container_id': 'elements'
};

function Pagination(config, objects) {
    this.config = config;
    this.objects = objects;
    this.current_page = 1;
    this.offset = this.config.items_per_page;
}


Pagination.prototype = {
    getDataForPage : function () {
        var data = [];
        for (var i = this.current_page-1; i < this.offset; i++) {
            data.push(this.objects[i]);
        }

        this.current_page += this.config.items_per_page;
        this.offset = (this.config.items_per_page + (this.current_page - 1));
        return data;
    },
    next : function () {
        var fragment = document.createDocumentFragment();
        var data = this.getDataForPage();
        var element, container;

        for (var i = 0; i < data.length; i++) {
            container = document.createElement('div');

            for (attr in data[i]) {
                element = document.createElement('p');
                element.innerHTML = attr + ": " + data[i][attr].toString();
                container.appendChild(element);
            }

            fragment.appendChild(container);
        }

        document.getElementById(this.config.container_id).appendChild(fragment.cloneNode(true));
    },
    back : function () {
        //incoming
    }
};

pagination = new Pagination(config, results);