Trick to keep the _linkover-Layer after click

Hey everybody,

if you work with _link and _linkover and mod_rewrite for example,
ive worte this hack to keep the active menu-Button on the Top!:

<script type="text/javascript">
//<!--
var hoverId;
var linkId;
$j(document).ready(function($){
uri = "<?=$_SERVER["REQUEST_URI"]?>";
sel = 'a[href*=\''+uri+'\']';
wrap = ($(sel).closest('div').attr('class'));

hoverId = '#'+$("."+wrap)[0].id;
linkId = '#'+$("."+wrap)[1].id;

reloadButton();

$(document).mousemove(function(e){
reloadButton();
});

function reloadButton(){
$(hoverId).show();
$(linkId).hide();
}
});
</script>