the view of 
      multiple sections inside the article-->
      <nav class="default" id="experiment-article-navigation">
        <ul id="experiment-article-navigation-menu">
          <!-- The menu can be dynamically generated to contain 
          the headings of your sections or instead write the 
          menu items of your choice individually enclosedu in 
          <li> tag as shown below-->
        </ul>
      </nav>

      <!-- All the sections of your lab or experiment can be 
      enclosed toget