function updateActionButtons() {
    if (0 !== count) {
        $('.action-menu').show();

        // also update labels:
        $('.mass-edit span').text(edit_selected_txt + ' (' + count + ')');
        $('.bulk-edit span').text(edit_bulk_selected_txt + ' (' + count + ')');
        $('.mass-delete span').text(delete_selected_txt + ' (' + count + ')');

    }
    if (0 === count) {
        $('.action-menu').hide();
    }
}
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.