jQuery實作的圖片分組切換焦點圖外掛_jquery

 

  $(function () {
            var $number = Math.ceil($('.scroll ul li').length / 4); //取得滾動幾個螢幕數
            var margin = 10; //設定圖片間距
            var $w = $('.scroll li').width() margin; // 一螢幕圖片的寬度
            var $width = $w * $number * 2; //設定ul寬度
            var pre = $('.device .pre');
            var next = $('.device .next');
            if ($number == 1) { pre.hide(); next.hide(); }
            $('.scroll ul').width($width);
            var num = 0;
            function autoscroll() {
                num ;
                if ($number == 1) { return false }
                if (num == $number) {
                    num = 0;
                }
                var distance = -2 * $w * num;
                $('.scroll ul').stop().animate({ left: distance });
            }
            var scrollChange = setInterval(autoscroll, 8000);
            //滑鼠懸停，暫停滾動
            $(".scroll ul,.pre,.next").mouseover(function () {
                $('.scroll ul').stop()
                clearInterval(scrollChange);
            });
            // 滑鼠移走，且捲動繼續
            $('.scroll ul,.pre,.next').mouseout(function () {
                scrollChange = setInterval(autoscroll, 8000);
            });
            //下一組
            next.click(function () {
                num ;
                if (num >= $number) { num = 0 }
                var leftdis = -2 * $w * num;
                $('.scroll ul').stop().animate({ left: leftdis });
            });
            //上一組
            pre.click(function () {
                num--;
                if (num                 var rightdis = -2 * $w * num;
                $('.scroll ul').stop().animate({ left: rightdis });
            });
        });