Option opened by default in a vertical multilevel sliding menu

Option opened by default in a vertical multilevel sliding menu

I am trying to work out a vertical multilevel sliding menu. I started using the UI accordion but I just discovered this code in an old post that works fine:
  1. $(function() {
       $('#accordion ul').hide();
       $('#accordion li:has(ul)').children('a').click(function(event) {
          $(this).next().slideToggle();
          $('ul',$(this).parent().siblings()).slideUp();
          event.stopPropagation();
       });
    });







The HTML is:
  1. <ul id="accordion">
      <li><a href="#">Item 1</a></li>
      <li><a href="#">Item 2</a>
        <ul>
          <li><a href="#">Sub Item 1</a>
              <ul>
                <li><a href="#">Sub_sub Item A</a></li>
                  <li><a href="#">Sub_sub Item B</a></li>
            </ul>
          </li>
          <li><a href="#">Sub Item 2</a></li>
          <li><a href="#">Sub Item 3</a></li>
        </ul>
      </li>
      <li><a href="#">Item 3</a></li>
      <li><a href="#">Item 4</a></li>
    </ul>















How can I do it so one of the 4 main options is opened by default (for example "Item 2")?

Thanks in advance