tracks/tracks/public/javascripts/toggle_notes.js

function toggleAll(className) {
  var elems = document.getElementsByClassName(className);
  for (var i = 0; i < elems.length; i++) {
    if (elems[i].style.display == 'block') 
    {
      elems[i].style.display = 'none';
    } 
    else
    {
      elems[i].style.display = 'block';
    }
  }
}

function SetCookie (name, value) {
  var argv = SetCookie.arguments;
  var argc = SetCookie.arguments.length;
  var expires = (argc > 2) ? argv[2] : null;
  var path = (argc > 3) ? argv[3] : null;
  var domain = (argc > 4) ? argv[4] : null;
  var secure = (argc > 5) ? argv[5] : false;
  document.cookie = name + "=" + escape (value) +
  ((expires == null) ? "" : ("; expires=" +
  expires.toGMTString())) +
  ((path == null) ? "" : ("; path=" + path)) +
  ((domain == null) ? "" : ("; domain=" + domain)) +
  ((secure == true) ? "; secure" : "");
}

var bikky = document.cookie;

  function getCookie(name) { // use: getCookie("name");
    var index = bikky.indexOf(name + "=");
    if (index == -1) return null;
    index = bikky.indexOf("=", index) + 1; // first character
    var endstr = bikky.indexOf(";", index);
    if (endstr == -1) endstr = bikky.length; // last character
    return unescape(bikky.substring(index, endstr));
  }