library.js

function randomstring(length) {
  var chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
  var result = '';
  for (var i = length; i > 0; --i) result += chars[Math.round(Math.random() * (chars.length - 1))];
  return result;
}

function shuffle(array) {
  var currentIndex = array.length;
  var temporaryValue;
  var randomIndex;

  // While there remain elements to shuffle...
  while (0 !== currentIndex){

    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;

    // And swap it with the current element.
    temporaryValue = array[currentIndex];
    array[currentIndex] = array[randomIndex];
    array[randomIndex] = temporaryValue;
  }

  return array;
}

function createURL(root,obj){
  var add = '?';
  for (var key in obj){
    if(obj.hasOwnProperty(key)){
      add += key + '=' + obj[key] + '&';
    }
  }
  return root + add.slice(0,-1);
}

function getUrlVars(string)
{
  var vars = [], hash;
  if(string){
    input = string;
  } else {
    input = window.location.href;
  }

  var hashes = input.slice(window.location.href.indexOf('?') + 1).split('&');
  for(var i = 0; i < hashes.length; i++)
  {
    hash = hashes[i].split('=');
    vars.push(hash[0]);
    vars[hash[0]] = hash[1];
  }
  return vars;
}