var drop = {

   init: function(){
     $$('#nav-menu li').each(function(el){
        el.addEvent('mouseover', function(){
            var ul = el.getElement('ul');
            if( $chk(ul) ){
                ul.set('tween', {duration:250});
                ul.tween('opacity', 0.8);
            }
        });
        el.addEvent('mouseout', function(){
              var ul = el.getElement('ul');
            if( $chk(ul) ){
                ul.set('tween', {duration:500});
                ul.tween('opacity', 0);
            }
        });         
    });
  }
}



var r = {


  init:function(){
   drop.init();
    $$('#nav-menu>ul>li').each(function(el){
      
      el.addEvent('mouseover', function(){
          var img = this.getElement('img');
        if(!img.src.contains('_act') ) img.src = img.src.replace('.jpg', '_ov.jpg');
      });
      el.addEvent('mouseout', function(){
        var img = this.getElement('img');
        img.src = img.src.replace('_ov', '');
     });
    });
  }

}

window.addEvent('domready', r.init);