/*
Copyright (C) 2007 Google Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

function onOpen() {
  // Set the checkmarks in the dialog to the current settings
  checkboxA.value = (options.getValue("checkboxa") == "ON");
  checkboxB.value = (options.getValue("checkboxb") == "ON");
  checkboxC.value = (options.getValue("checkboxc") == "ON");
}

function onCancel() {
  // No settings will be saved.
}

function onOk() {
  // At least one must be checked.
  if (!checkboxA.value && !checkboxB.value && !checkboxC.value) {
    prompt.color = "#FF0000";
    event.returnValue = false;
    return false;
  }

  // Save all the settings only if required
  options.putValue("checkboxa", checkboxA.value ? "ON" : "OFF");
  options.putValue("checkboxb", checkboxB.value ? "ON" : "OFF");
  options.putValue("checkboxc", checkboxC.value ? "ON" : "OFF");
}