[jQuery] background position

[pab]

Hi, I was messing around with jonathna snook;s article

http://snook.ca/archives/javascript/jquery-bg-image-animations/

I'm trying to set an active state once user clicks on link

this is what I have now works, i tried getting the selected state by
adding a click function.



$(document).ready(function() {
$('ul#nav li a')
.css( {backgroundPosition: "0 0"} )
                .mouseover(function(){
                        $(this).stop().animate({backgroundPosition:"(0 
-120px)"}, {duration:
500})
                })
                .mouseout(function(){
                        $(this).stop().animate({backgroundPosition:"(0 0)"}, 
{duration:
500})
                })

});


If anyone has nay pointers it would e rgeatly appreciated

thanks