Gallery js non funziona su IE

[dla86]

ti ringrazio però.....
scusa ma che significa??
questo il codice js... l'errore sarebbe alla linea 8 per cui:
item = $('.list li');
e come mai è sbagliato?..non conosco js ...

$(document).ready(function() { 
     $('.prev').css("background-image" , "none"); 

    
    
    //Initialize
    onMoving            = false;
    item                = $('.list li');
    itemReverse        = item.get().reverse();
    itemSize            = item.size();
    itemDisplayed    = 6;
    itemToSlide        = itemDisplayed * 9;
    currentSlide    = 1;
    page                = Math.round(itemSize/itemDisplayed);

    //Next button clicked
    $('.next').click(function() {
    
        if(currentSlide >= 7) {
            $(this).css("background-image" , "none");
        }
        if(currentSlide >= 1) {
            $('.prev').css("background-image" , "url('images/prev.png')");
        }   
        if(onMoving || currentSlide >= 8)
            return false;
        
        
        onMoving = true, currentSlide++;     
        
        $.each(item, function() {
            
            var i      = $(this).index();
            var delay = i * 100;

            window.setTimeout(function (index) {
                return function () {
                    item.eq(index).stop().animate({ 'right' : '+='+itemToSlide+'em' }, function() {
                   if(index >= itemSize-1) onMoving = false;
                    });
                };
            } (i), delay);
        });
    });
    
    //Previous button clicked
    $('.prev').click(function() {
        
        if(currentSlide <= 8) {
            $('.next').css("background-image" , "url('images/next.png')");
        }
        if(currentSlide <= 2) {
            $(this).css("background-image" , "none");
        }   

        if(onMoving || currentSlide == 1) return false;
        onMoving = true, currentSlide--;
        
        
        
        $.each(itemReverse, function() {
            
            var i      = $(this).index();
            var delay = i * 100;
            
            window.setTimeout(function (index) {
                return function () {
                    $(itemReverse).eq(index).stop().animate({ 'right' : '-='+itemToSlide+'em' }, function() {
                        if(index >= 0) onMoving = false;
                    });
                };
            } (i), delay);      
        });
    });
});