window.addEvent('domready',function(){
        var links = $$('a.menu-item');
        var contents = $$('div.item-content');
       
        contents.set('slide',{
            duration:250
         // not possible in IE7/8-->  transition:Fx.Transitions.Back.easeIn 
        });
      
       contents.slide('hide');
    
       links.addEvent('click',function(e){
           e.stop();
           var index = links.indexOf(this);
           if(!contents.some(function(content,i){
               var slide = content.get('slide');
               if(slide.open && i != index){
                   slide.slideOut().chain(function(){contents[index].slide('in')});
                   return true;
               }
           })){
               contents[index].slide('toggle');
           }
       });
   });