var menuTicker = function() {
      this._menuItems = $('#menu_images').children();

      this.activateMenu = function(i) {
         $(this._menuItems[i]).fadeIn('slow');
      }

      this.deactivateMenu = function(i) {
         $(this._menuItems[i]).fadeOut('slow');
      }


      this._lastActive = 0;
      var thisTicker = this;
      this.timer = setTimeout(function () { thisTicker.ticker(); }, 4000);

      this.ticker = function() {
         this.deactivateMenu(this._lastActive);
         this._lastActive++;
      
         if (this._lastActive > (this._menuItems.length-1)) this._lastActive = 0;
         this.activateMenu(this._lastActive);

         this.timer = setTimeout(function () { thisTicker.ticker(); }, 4000);
      }

      for (var i=0;this._menuItems.length>i;i++) {
         $(this._menuItems[i]).tickerId = i;
      }
  }
  
  $(document).ready( function(){new menuTicker()});