/* base class extensions */
String.prototype.trim = function() {
  return this.replace(/^\s+/, '').replace(/\s+$/, '');
}
Array.prototype.indexOf = function(elem) {
  for (var i=0; i<this.length; i++) {
    if (this[i] == elem) return i;
  }
  return -1;
}

/* dom helpers */
function hasClass(elem, name) {
  var arr = elem.className.split(' ');
  if (arr.indexOf(name) != -1) {
    return true;
  }
  return false;
}
function addClass(elem, name) {
  var arr = elem.className.split(' ');
  if (arr.indexOf(name) == -1) {
    arr.push(name);
    elem.className = arr.join(" ");
  }
}
function removeClass(elem, name) {
  var arr = elem.className.split(' ');
  var arr2 = [];
  for (var i=0; i<arr.length; i++) {
    if (arr[i] != name) {
      arr2.push(arr[i]);
    }
  }
  elem.className = arr2.join(" ");
}
function replaceClass(elem, old_class, new_class) {
  addClass(elem, new_class);
  removeClass(elem, old_class);
}

/* cookie helpers */
function setCookie(name, value, permanent) {
  var expires = '';
  if (permanent) {
    expires = '; expires=' + (new Date()).toGMTString().replace(/20\d\d/, 2020);
  }
  document.cookie = name+"="+value+expires+"; path=/";
}
function getCookie(name) {
  var i, crumbs, crumb;
  crumbs = document.cookie.split(';');
  for (var i=0; i<crumbs.length; i++) {
    crumb = crumbs[i].trim();
    if (crumb.indexOf(name + "=") == 0) {
      return crumb.substring((name + "=").length);
    }
  }
  return '';
}

/* el customizer */
function loadPreferences() {
  var cookie = getCookie('skittlish');
  if (cookie == '') {
    cookie = 'fluid blue';
  }
  document.getElementsByTagName('body')[0].className = cookie;
}