mark menu(li)

mark menu(li)

I want to mark selected menu(li)? How can I do that?
kode:
menu
  1. <ul id="tabs">
  2.       <li><a href="#" rel="div1"><span>Personal information</span></a></li>
  3.       <li><a href="#" rel="div5"><span>About</span></a></li>
  4.       <li><a href="#" rel="div6"><span>Contact me</span></a></li>
  5.   </ul>
jquery

  1. $("#tabs a").click(function (e) {
  2.     e.preventDefault(); 
  3.     
  4.     $("#panel_wrapper>div").hide(500); 
  5.     var idx = $(this).closest('li').index(); 
  6.     $("#panel_wrapper>div:eq("+idx+")").toggle(1000);
  7. $(this).toggleClass('active');
  8. });
  9. $("#tabs a:eq(0)").trigger("click");
any help?