function next_image(){
            var current_image=$('#banner .current');
            if(current_image.hasClass('last')){
              var next_image=$('#banner .first');
            }else{
              var next_image=$('#banner .current').next();
            }
            next_image.addClass('current').fadeIn(1500);
            current_image.removeClass('current').fadeOut(1000);
          }

          setInterval('next_image()',8000);