// JavaScript Document

        //主函數 廣告輪播
        var s = function() {
            var interv = 8000; //切換間隔時間
            var interv2 = 30; //切換速速
            var opac1 = 60; //文字背景的透明度
            var source = "fade_focus" //焦點輪換圖片容器的id名稱
            //獲取對象
            function getTag(tag, obj) { if (obj == null) { return document.getElementsByTagName(tag) } else { return obj.getElementsByTagName(tag) } }
            function getid(id) { return document.getElementById(id) };
            var opac = 0, j = 0, t = 63, num, scton = 0, timer, timer2, timer3;
            var id = getid(source); id.removeChild(getTag("div", id)[0]);
            var li = getTag("li", id); var div = document.createElement("div");
            var title = document.createElement("div");
            var span = document.createElement("span");
            var button = document.createElement("div"); button.className = "button";
            for (var i = 0; i < li.length; i++) {
                var a = document.createElement("a"); a.innerHTML = i + 1;
                a.onclick = function() {
                    clearTimeout(timer); clearTimeout(timer2); clearTimeout(timer3);
                    j = parseInt(this.innerHTML) - 1; scton = 0; t = 63; opac = 0; fadeon();
                };
                a.className = "liehuo_b1";
                a.onmouseover = function() { this.className = "liehuo_b2" };
                a.onmouseout = function() { this.className = "liehuo_b1"; sc(j) }; button.appendChild(a);
            }
            //控制圖層透明度
            function alpha(obj, n) { if (document.all) { obj.style.filter = "alpha(opacity=" + n + ")"; } else { obj.style.opacity = (n / 100); } }
            //控制焦點按鈕
            function sc(n) { for (var i = 0; i < li.length; i++) { button.childNodes[i].className = "liehuo_b1" }; button.childNodes[n].className = "liehuo_b2"; }
            title.className = "num_list"; title.appendChild(span); alpha(title, opac1); id.className = "liehuo_d1"; div.className = "liehuo_d2"; id.appendChild(div); id.appendChild(title); id.appendChild(button);
            //漸顯
            var fadeon = function() { opac += 5; div.innerHTML = li[j].innerHTML; span.innerHTML = getTag("img", li[j])[0].alt; alpha(div, opac); if (scton == 0) { sc(j); num = -2; scrolltxt(); scton = 1 }; if (opac < 100) { timer = setTimeout(fadeon, interv2) } else { timer2 = setTimeout(fadeout, interv); }; }
            //漸隱
            var fadeout = function() { opac -= 5; div.innerHTML = li[j].innerHTML; alpha(div, opac); if (scton == 0) { num = 2; scrolltxt(); scton = 1 }; if (opac > 0) { timer = setTimeout(fadeout, interv2) } else { if (j < li.length - 1) { j++ } else { j = 0 }; fadeon() }; }
            //滾動文字
            var scrolltxt = function() { t += num; span.style.marginTop = t + "px"; if (num < 0 && t > 3) { timer3 = setTimeout(scrolltxt, interv2) } else if (num > 0 && t < 62) { timer3 = setTimeout(scrolltxt, interv2) } else { scton = 0 } };
            fadeon();
        }
        //初始化
        window.onload = s;