# Enable/Disable various buttons
#
sub update_buttons {
    if ($online == 0) {  # We are Offline
       $rd_b2->configure(-state => 'disabled');
#        $mw->$seg2_f->$rd_b2->configure(-state => 'disabled');
    } else {             # We are Online
       $rd_b2->configure(-state => 'normal');
#        $mw->$seg2_f->$rd_b2->configure(-state => 'normal');
    }
}