How to keep focus on div while using pagination and not refresh the entire page

Code:

var $data;



    function index($sort_by = 'eorder', $sort_order = 'asc', $offset = 0) {

        

        $limit = 10;

        $data['fields'] = array(

            'rank' => 'Rank',

            'score' => 'Points',

        ); //The above will be sortable columns



        $ranks = $this->rank_model->get_scoring($limit, $offset, $sort_by, $sort_order);



        $data['scores'] = $ranks['rows'];

        $data['num_results'] = $ranks['num_rows'];

        $data['num_pages'] = $data['num_results']/$limit;    

                

        // pagination

        $this->load->library('pagination');

        $config = array();

        $config['base_url'] = site_url("home/index/$sort_by/$sort_order");

        $config['total_rows'] = $data['num_results'];

        $config['per_page'] = $limit;

        $config['uri_segment'] = 5;

        $this->pagination->initialize($config);

        $data['pagination'] = $this->pagination->create_links();



        $data['sort_by'] = $sort_by;

        $data['sort_order'] = $sort_order;

        

        $this->load->view('includes/header', $this->data);

        $data['main_content'] = 'home/home_index';

        $this->load->view('includes/template', $data);

    }

Code:

<ul><li>

<div id="tableside" class="tableside">

            <table>

                <tbody>

                    &lt;?php foreach ($fields as $field_name => $field_display): ?&gt;

                    <th>

                        &lt;?php if ($sort_by == $field_name)

                            echo "class=\"sort_$sort_order\"" ?&gt;

                        &lt;?php

                        echo anchor("home/display/$field_name/" .

                                (($sort_order == 'asc' && $sort_by == $field_name) ? 'desc' : 'asc'), $field_display);

                        ?&gt;

                    </th>

                &lt;?php endforeach; ?&gt;



                &lt;?php foreach ($scores as $cmd): ?&gt;

                    <tr>

                        &lt;?php foreach ($fields as $field_name => $field_display): ?&gt;

                            <td>&lt;?php echo $cmd->$field_name; ?&gt;</td>

                        &lt;?php endforeach; ?&gt;

                    </tr>

                &lt;?php endforeach; ?&gt;

                </tbody>

            </table>

</div></li>

<li>

 <div id='pages' align='center'>

        &lt;?php if (strlen($pagination)): ?&gt;

                        Pages:

            &lt;?php echo $pagination; ?&gt;

        &lt;?php endif; ?&gt;

</div>

</li>

</ul>