$(document).ready(function() {
  $("#leftnav .level1>.item.current ul").slideToggle(100);
  $("#leftnav .level1>.item.current img:first").attr("src", "arrowdown.png");
  $("#leftnav .level1>.item").css("cursor","pointer");
  $("#leftnav  .level1>.item:has(.level2>.item)>div").each(function(){
   $(this).find("a:first").attr("href","#");
   $(this).toggle(function(){toggleNav($(this))},function(){toggleNav($(this))});
  });
});
function toggleNav(div){
 var wasVisible = div.next().is(":visible");
 $(".level2").hide(100);
 $(".level1>.item>div>img").attr("src", "arrowleft.png");
 if (!wasVisible)
   {
     div.next().slideToggle(100);
     div.find("img:first").attr("src", "arrowdown.png");
   }
}