function array_walk_recursive (array, funcname, userdata) {
  // http://kevin.vanzonneveld.net
  // +   original by: Johnny Mast (http://www.phpvrouwen.nl)
  // *     example 1: array_walk_recursive ({'a': 'b', 'c': {'d': 'e'}}, 'void', 'userdata');
  // *     returns 1: true
  // *     example 2: array_walk_recursive ('a', 'void', 'userdata');
  // *     returns 2: false
  var key;

  if (typeof array !== 'object') {
    return false;
  }

  for (key in array) {
    if (typeof array[key] === 'object') {
      return this.array_walk_recursive(array[key], funcname, userdata);
    }

    if (typeof userdata !== 'undefined') {
      eval(funcname + '( array [key] , key , userdata  )');
    } else {
      eval(funcname + '(  userdata ) ');
    }
  }

  return true;
}

array_walk_recursive ({'a': 'b', 'c': {'d': 'e'}}, 'void', 'userdata');

true

array_walk_recursive ('a', 'void', 'userdata');

false