// JScript 文件

        var s=function(){
        var interv=3000; //切换间隔时间
        var interv2=10; //切换速速
        var opac1=100; //文字背景的透明度
        var source="fade_focus" //图片容器id
        //获取对象
        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-1;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="b1";
            a.onmouseover=function()
            {
                this.className="b2";
            };
            a.onmouseout=function()
            {
                this.className="b1";
                sc(j)
            };
            button.appendChild(a);
        }
        //控制透明度
        function alpha(obj,n)
        {
            if(document.all)
            {
                obj.style.filter="alpha(opacity="+n+")";
            }
            else
            {obj.style.opacity=(n/100);}
        }
        //控制焦点按钮
        function sc(n)
        {
            for(var i=li.length-1;i>=0;i--)
            {
                button.childNodes[i].className="b1";
            }
            button.childNodes[n].className="b2";
        }
       /* title.className="num_list";
        title.appendChild(span);*/
        alpha(title,opac1);
        id.className="d1";
        div.className="d2";
        id.appendChild(div);
        id.appendChild(title);
        id.appendChild(button);
        //渐显
        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);}
            }
        //渐隐
            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()}
                }
            //滚动文字
               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;