/*design by koen @ 10nian5yue8ri*/
/*http://hi.baidu.com/koen_li*/
function setMyFocus(ID,t){//主函数
function $(id) {return document.getElementById(id);}
function $$(tag,obj){return (typeof obj=='object'?obj:$(obj)).getElementsByTagName(tag);}
function poptit(n){//文字上下运动函数
 var ts = $$('li',tit);
 var H = ts[n].clientHeight;
 var setway=function(obj,y){obj.style.bottom=y+'px';}
 var getway=function(obj){return parseInt(obj.style.bottom);}
 var y1,y2;
 var up=function(){
  y1=getway(ts[n]);
  if (ts[n].movement) clearTimeout(ts[n].movement);//为了兼容变化中的点击
  if (y1 == 0) return true;
  y1+=Math.ceil((0 - y1) / 5);
  setway(ts[n],y1);
  if(y1<0) ts[n].movement = setTimeout(up, 1);
 }
 var down=function(){
  y2=getway(ts[N]);
  if (ts[N].movement) clearTimeout(ts[N].movement);
  if (y2 == -H) return true;
  y2+=Math.floor((-H - y2) / 5);
  setway(ts[N],y2);
  if(y2>-H) ts[N].movement = setTimeout(down, 1);
 }
 for(var i=0;i<ts.length;i++){
  if (!ts[i].style.bottom) ts[i].style.bottom = -H+'px';
  if(ts[i].name=='up') var N=i;
 }
 if(!N&&n==0) {//开始载入...
  ts[n].name='up';
  var y1=getway(ts[n]);
  up();
  return true;
 } 
 if(N==n) return true;//防止快速移出移入的抖动
 ts[N].name=''//标记淡入的name为空
 ts[n].name='up';
 down();
 up();
}
function opa(n){//图片淡入淡出函数
 var pics = $$('img',pic);
 var setfade=function(obj,o){
  if (document.all) obj.style.filter = "alpha(opacity=" + o + ")";
  else obj.style.opacity = (o / 100);
 };
 var getfade=function(obj){
  return (document.all)?((obj.filters.alpha)?obj.filters.alpha.opacity:false):((obj.style.opacity)?obj.style.opacity*100:false);
 }
 var show=function(){
  if(pics[n].move) clearTimeout(pics[n].move);
  if (o1 >= 100) return true;
  o1+=5;
  setfade(pics[n],o1);
  pics[n].move=setTimeout(show,1);
 };
 var hide=function(){
  if(pics[N].move) clearTimeout(pics[N].move);
  if (o2 <= 0) {pics[N].style.display='none';return true;}
  o2-=5;
  setfade(pics[N],o2);
  pics[N].move=setTimeout(hide,1);
 };
 for(var i=0;i<pics.length;i++){
  if(!getfade(pics[i])) {setfade(pics[i],0);pics[i].style.display='none';}
  if(pics[i].name=='out') var N=i;
 }
 if(!N&&n==0) {//开始载入...
  pics[n].name='out';
  pics[n].style.display='';
  var o1=getfade(pics[n]);
  show();
  return true;
 }
 if(N==n) return true;
 pics[N].name=''
 pics[n].name='out';
 pics[n].style.display='';
 var o1=getfade(pics[n]);
 var o2=getfade(pics[N]);
 hide();
 show();
}
function classNormal() {//数字标签样式清除
    var focusBtnList = $$('li',btn);
    for (var i = 0; i < focusBtnList.length; i++) {
        focusBtnList[i].className = '';
    }
}
function autoFocusChange() {//自动运行
    if (atuokey) return;
    var focusBtnList = $$('li',btn);
    for (var i = 0; i < focusBtnList.length; i++) {
        if (focusBtnList[i].className == 'current') {
            var currentNum = i;
        }
    }
 if(currentNum<focusBtnList.length-1){
  poptit(currentNum+1);
  opa(currentNum+1);
        classNormal();
        focusBtnList[currentNum+1].className = 'current';
 }else if(currentNum==focusBtnList.length-1){
  poptit(0);
  opa(0);
        classNormal();
        focusBtnList[0].className = 'current';
 }
}
function focusChange() {//交互切换
    var focusBtnList = $$('li',btn);
    for (var i = 0; i < focusBtnList.length; i++) {
  focusBtnList[i].I=i;

  focusBtnList[i].onclick = function(){
         poptit(this.I);
   opa(this.I);
         classNormal();
         focusBtnList[this.I].className = 'current';
  }
  focusBtnList[i].onmouseover = function(){
   if(!this.className) this.className = 'hover'
  }
  focusBtnList[i].onmouseout = function(){
   if(this.className=='hover') this.className ='';
  }
 }
}
function init(){//初始化
 $(ID).removeChild($$('div',ID)[2]);
 opa(0);
 poptit(0);
    classNormal();
    $$('li',$$('div',ID)[4])[0].className = 'current';
 $(ID).onmouseover = function() {
        atuokey = true;
  clearInterval(auto);
    }
    $(ID).onmouseout = function() {
        atuokey = false;
  auto=setInterval(autoFocusChange, T);
    }
}
var ul=$$('ul',ID)[0];
var li=$$('li',ul);
var NUM=li.length;
var s1='<div class="tsBg"></div><div class="btnBg"><ul>';for(var i=0;i<NUM;i++){s1+='<li></li>'};s1+='</ul></div>';
var s2='<div class="ts"><ul>';
for(var i=0;i<NUM;i++){var a=$$('a',li[i])[0];var img=$$('img',li[i])[0];s2+='<li><a href="'+a.href+'">'+img.alt+'</a></li>'};s2+='</ul></div>';
var s3='<div class="btn"><ul>';
for(var i=0;i<NUM;i++){s3+='<li>'+(i+1)+'</li>'};s3+='</ul></div>';
$(ID).innerHTML=s1+$(ID).innerHTML+s2+s3;
//生成HTML结束
var pic=$$('div',ID)[3];
var tit=$$('div',ID)[4];
var btn=$$('div',ID)[5];
var atuokey = '';
var auto='';
var T=t*1000;//每帧图片停留的时间，1000=1秒
 init();
 focusChange();
 auto=setInterval(autoFocusChange, T);
}
window.onload=function(){
 setMyFocus('myFocus',3)
}