Options can also be set using the method
      <code>setOptions</code>.
    </li>
  </ul>

  <h2 id="Data_Format">Data Format</h2>

  <p>
    The timeline can be provided with two types of data:
  </p>
  <ul>
    <li><a href="#items">Items</a> containing a set of items to be displayed in time.</li>
    <li><a href="#groups">Groups</a> containing a set of groups used to group items
      together.</li>
  </ul>

  <h3 id="items">Items</h3>
  <p>
    For items, the Timeline accepts an Array, a DataSet (offerin