gistfile1.js

Element.addMethods({
  store: function(element, key, value) {
    if (!(element = $(element))) return;
    var storage = element.getStorage();
    if (Object.isUndefined(value)) {
      for (var prop in key) {
        storage.set(prop, key[prop]);
      }
    }
    else {
      storage.set(key, value);
    }
    return element;
  }
});