< $check_switch_i->bind('', \&button_run('now')); < $check_switch_m->bind('', \&button_run('now')); < $check_switch_s->bind('', \&button_run('now')); > $check_switch_i->bind('', sub { button_run('now') }); > $check_switch_m->bind('', sub { button_run('now') }); > $check_switch_s->bind('', sub { button_run('now') });