swap() and jumble() functions for jQuery

jquery.swap-jumble.js

/**
 * http://plugins.jquery.com/project/swap-jumble
 */
(function($){

$.fn.swap = function(b){
    b = $(b)[0];
    var a = this[0];
    var t = a.parentNode.insertBefore(document.createTextNode(''), a);
    b.parentNode.insertBefore(a, b);
    t.parentNode.insertBefore(b, t);
    t.parentNode.removeChild(t);
    return this;
};

$.fn.jumble = function(){
  var max = this.length;
  for (var i=0; i<max*2; i++) {
    var a = Math.floor(Math.random()*max);
    var b = a;
    while (b==a)
      b = Math.floor(Math.random()*max);
    $(this[a]).swap(this[b]);
  }
  return this;
};

})(jQuery);