Shuffle an array, not the best, but will do

gistfile1.js

function shuffle(array) {
  var newArray = [], i;
  while (array.length) {
    i = ~~(Math.random() * array.length);
    newArray.push(array[i]);
    array = array.slice(0, i).concat( array.slice(i+1) );
  }
  return newArray;  
}