function pmpros_ajax()
{
    if (isset($_REQUEST['pmpros_add_post'])) {
        $series_id = $_REQUEST['pmpros_series'];
        $series = new PMProSeries($series_id);
        $series->getPostListForMetaBox();
        exit;
    }
}
    static function seriesMetaBox()
    {
        global $post;
        $series = new PMProSeries($post->ID);
        ?>
		<div id="pmpros_series_posts">
		<?php 
        $series->getPostListForMetaBox();
        ?>
		</div>				
		<?php 
    }