Add custom action in post type

I use the http://www.deluxeblogtips.com/meta-box Metabox plugin and I want to add a custom action in a post type like the publish button ? when admin click on this button I want to send an email to the author and delete the current post type.

I have added the button in my post like this :

    // meta box
    $meta_boxes[] = array(
            'title' => __('Reviewer','sparta'),
            'pages' => array( 'download'),
            'fields' => array(
                array(
            'name' => __('Reject','sparta'),
            'desc' => __('reject this                  post.','sparta'),
                      'id' => $prefix . 'reject_post',
                      'type' => 'button',
                      'std' => ''
                )));

My question is how to execute my action from this button ?
someone has an idea ?

Thank you very much