gistfile1.js

// Add a function to jQuery to randomise selectors
$.fn.randomize = function(selector){
  (selector ? this.find(selector) : this).parent().each(function(){
    $(this).children(selector).sort(function(){
      return Math.random() - 0.5;
    }).detach().appendTo(this);
  });

  return this;
};

$(function () {
  // Randomise li elements
  $('ul.members').randomize('li');
});