仅有的分数拿来问大家个问题


<script type="text/javascript">
        var t=0,n=0,count;
        $(document).ready(function(){
            count=$("#change_list a").length;
            $("#change_list a:not(:first-child)").hide();
            $("#change li:first").css({"background":"#7E807F","color":"#fff","font-weight":"bold"});
            $("#change_info").html($("#change_list a:first-child").find("img").attr("alt"));
            $("#change_info").click(function(){window.open($("#change_list a:first-child").attr("href"),"_blank")});
            $("#change li").click(function(){
                var i = $(this).html()-1;
                n=i;
                if(i>=count)return;
                $("#change_info").html($("#change_list a").eq(i).find("img").attr('alt'));
                $("#change_info").unbind().click(function(){window.open($("#change_list a").eq(i).attr("href"),"_blank")});
                $("#change_list a").filter(":visible").fadeOut(1000).parent().children().eq(i).fadeIn(1000);
                //$("#change_list a").filter(":visible").animate({marginLeft:"266px"},500).parent().children().eq(i).css("display","block").animate({marginLeft:"266px"},500);
                $(this).css({"background":"#7E807F","color":"#fff","font-weight":"bold"}).siblings().css({"background":"#fff","color":"#000"});
            });
            t = setInterval("ShowAuto()",1000);
            $("#change").hover(function(){clearInterval(t)},function(){t=setInterval("ShowAuto()",1000)});
        })
        function ShowAuto()
        {
            n=n>=(count-1)?0:++n;
            $("#change li").eq(n).trigger("click");
        }
    </script>这段jquery是自己结合网上写的图片轮换，
想问各位大侠下这段jquery效率高吗？