Event.observe(window, 'load', function() {
      $('repository_list').hide();
	  $('genre_list').hide();
	  $('collection_list').hide();
	});

function toggleIt(type){
   $(type).toggle();
   if($(type).visible()){
            $(type + '_a').update('(-)');
        } else {
            $(type + '_a').update('(+)');
        }
   
}

Used to make a show/hide nagigation w/ prototype js framework

HTML looks like: 

	<h3><a href="#">Repository <span>(+)</span> </a></h3>
	<ul>

Prototype: show hide navigation with

JavaScript