cookie.js

function setCookie(name, value, daysToLive) {
  var cookie = name + "=" + encodeURIComponent(value);
  if (typeof daysToLive === "number") {
    cookie += "; max-age=" + (daysToLive*60*60*24);
  }
  document.cookie = cookie;
}

function getCookie() {
  var cookie = {};
  var all = document.cookie;
  if (all === "") {
    return cookie;
  }
  
  var list = all.split("; ");
  for (var i = 0; i < list.length; i++) {
    var cookie = list[i];
    var p = cookie.indexOf("=");
    var n = cookie.substring(0, p);
    var v = cookie.substring(p+1);
    cookie[n] = v;
  }
  return cookie;
}