Using functional way to grab all windows in a window.

getWindows.js

var map = Array.prototype.map.call
  , reduce = Array.prototype.reduce.call
  , filter = Array.prototype.filter.call
  , concat = Array.prototype.concat.call;
/**
 * Recursively get all windows of current window.
 * @param {Window} win Current window.
 * @param {Function} f Extra filter to throw away undesired frame.
 * @param {boolean} recursion Whether invocation is in recursion.
 * @returns {Array.<Window>}
 */
var getWindows = function (win, f, recursion) {
  // when in recursion, filter is already calculated.
  f = recursion ? f : _.and(f, function (w) {
    try {
      // simple invoke to see whether we can access sub window.
      return !!(w.location.href || true);
    } catch (err) {
      return false;
    }
  });

  return _.compose(
    // including current window in recursion
    _.partialRight(goog.array.reduce, _.lock(goog.array.concat, 2), recursion ? [win] : []),
    _.partialRight(goog.array.map, _.lock(_.partialRight(dom.getWindows, f, true), 1)),
    _.partialRight(goog.array.filter, f)
  )(win.frames);
};

// refer to http://lodash.com/docs and http://docs.closure-library.googlecode.com/git/namespace_goog_functions.html to see how `_` implemented.