zoneminder/web/skins/classic/views/js/group.js

function selectMonitors() {
  createPopup( '?view=monitorselect&callForm=groupForm&callField=newGroup[MonitorIds]', 'zmMonitors', 'monitorselect' );
}

if ( refreshParent ) {
  opener.location.reload(true);
}

function configureButtons( element ) {
  if ( canEditGroups ) {
    var form = element.form;
    form.saveBtn.disabled = (element.value == 0);
  }
}

window.focus();