[jQuery] ajax loaded content and selecting current page show in navigation

[aldomatic]

So I have an issue, I want to highlight the link which is currently
being viewed. The content is loaded via the LOAD method, but when I
click on the other links the added class still  remains and highlights
them all. I want to highlight just the current loaded page and not the
others.

Here is the script I am working with:
$(document).ready(function(){
        $("div#header_nav ul li a").click(function(){
                //var getTitle = $(this).attr('title');
        $('div#contentWrapper').hide('slow',loadContent);
                var toLoad = $(this).attr('href')+' #contentWrapper';
         function loadContent() {
      $('div#contentWrapper').load(toLoad,'',showNewContent())
        }
         function showNewContent() {
      $('div#contentWrapper').animate({opacity: 'toggle', height:
'toggle'});
        }
        return false;
        });
});

The navigation is just an UL list. As you can see i was trying to do
an IF statement based on the Title attribute of the links.

Any help will be greatly appreciated, I have been at this for a while
now.
Thanks.