function map(func, arr){
  ret = [];
  for (var i = 0; i < arr.length; i++) {
    ret[i] = func(arr[i]);
  }
  return ret;
}

function reduce(func, arr){
  var last = null;
  if (arr.length <= 1) { return; }
  if (arr.length == 2) { return func(arr[0],arr[1]); }
  last = arr[0];
  for (var i = 1; i < arr.length; i++) {
    last = func(last,arr[i]);
  }
  return last;
}

function filter(func, arr){
  ret = [];
  for (var i = 0; i < arr.length; i++) {
    if(func(arr[i]) == true)
      ret[ret.length] = arr[i];
  }
  return ret;
}

function init() {
  var f = function (r) {
    if (document.all) {
      kids = r.childNodes[0].childNodes;
    }
    // Strip out stupid linebreak false-alarm elems
    else {
      var pat = /[^\n\r]/;
      var kids = Array.prototype.slice.apply(
        r.childNodes[0].childNodes);
      var removeLineBreaks = function (item) {
         return pat.test(item.textContent);
      };
      kids = filter(removeLineBreaks, kids);
    }
    alert(kids.length);
  };
  fleegix.xhr.doGet(f, '/test.xml', 'xml');
};