var $ = function (id) {
      return "string" == typeof id ? document.getElementById(id) : id;
};

var Class = {
create: function() {
          return function() {
            this.initialize.apply(this, arguments);
          }
        }
}

Object.extend = function(destination, source) {
  for (var property in source) {
    destination[property] = source[property];
  }
  return destination;
}

var TransformView = Class.create();
TransformView.prototype = {
  //容器对象,滑动对象,切换参数,切换数量
initialize: function(container, slider, parameter, count, options) {
              if(parameter <= 0 || count <= 0) return;
              var oContainer = $(container), oSlider = $(slider), oThis = this;

              this.Index = 0;//当前索引

              this._timer = null;//定时器
              this._slider = oSlider;//滑动对象
              this._parameter = parameter;//切换参数
              this._count = count || 0;//切换数量
              this._target = 0;//目标参数

              this.SetOptions(options);

              this.Up = !!this.options.Up;
              this.Step = Math.abs(this.options.Step);
              this.Time = Math.abs(this.options.Time);
              this.Auto = !!this.options.Auto;
              this.Pause = Math.abs(this.options.Pause);
              this.onStart = this.options.onStart;
              this.onFinish = this.options.onFinish;

              oContainer.style.overflow = "hidden";
              oContainer.style.position = "relative";

              oSlider.style.position = "absolute";
              oSlider.style.top = oSlider.style.left = 0;
            },
            //设置默认属性
SetOptions: function(options) {
              this.options = {//默认值
Up:			true,//是否向上(否则向左)
        Step:		10,//滑动变化率
        Time:		10,//滑动延时
        Auto:		true,//是否自动转换
        Pause:		3000,//停顿时间(Auto为true时有效)
        onStart:	function(){},//开始转换时执行
        onFinish:	function(){}//完成转换时执行
              };
              Object.extend(this.options, options || {});
            },
            //开始切换设置
Start: function() {
         if(this.Index < 0){
           this.Index = this._count - 1;
         } else if (this.Index >= this._count){ this.Index = 0; }

         this._target = -1 * this._parameter * this.Index;
         this.onStart();
         this.Move();
       },
       //移动
Move: function() {
        clearTimeout(this._timer);
        var oThis = this, style = this.Up ? "top" : "left", iNow = parseInt(this._slider.style[style]) || 0, iStep = this.GetStep(this._target, iNow);

        if (iStep != 0) {
          this._slider.style[style] = (iNow + iStep) + "px";
          this._timer = setTimeout(function(){ oThis.Move(); }, this.Time);
        } else {
          this._slider.style[style] = this._target + "px";
          this.onFinish();
          if (this.Auto) {
            if (this.Index == 0) {
              this._timer = setTimeout(function(){ oThis.Index++; oThis.Start(); }, this.Pause + 10000);
            } else {
              this._timer = setTimeout(function(){ oThis.Index++; oThis.Start(); }, this.Pause);
            }
          }
        }
      },
      //获取步长
GetStep: function(iTarget, iNow) {
           var iStep = (iTarget - iNow) / this.Step;
           if (iStep == 0) return 0;
           if (Math.abs(iStep) < 1) return (iStep > 0 ? 1 : -1);
           return iStep;
         },
         //停止
Stop: function(iTarget, iNow) {
        clearTimeout(this._timer);
        this._slider.style[this.Up ? "top" : "left"] = this._target + "px";
      }
};

window.onload=function(){
  function Each(list, fun){
    for (var i = 0, len = list.length; i < len; i++) {
      fun(list[i], i); }
  };

  var objs2 = $("idNum2").getElementsByTagName("li");

  var tv2 = new TransformView("idTransformView2", "idSlider2", 518, 6, {
onStart: function(){
Each(objs2, function(o, i){ o.className = tv2.Index == i ? "on" : ""; }) },//按钮样式
Up: false
});


tv2.Start();

Each(objs2, function(o, i){
    o.onmouseover = function(){
    o.className = "on";
    tv2.Auto = false;
    tv2.Index = i;
    tv2.Start();
    }
    o.onmouseout = function(){
    o.className = "";
    tv2.Auto = true;
    tv2.Start();
    }
    })

$("idStop").onclick = function(){ tv2.Auto = false; tv2.Stop(); }
$("idStart").onclick = function(){ tv2.Auto = true; tv2.Start(); }
$("idNext").onclick = function(){ tv2.Index++; tv2.Start(); }
$("idPre").onclick = function(){ tv2.Index--;tv2.Start(); }
}