// JScript 文件
var isIE = (document.all) ? true : false;
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;
}
//ie only
var TransView = Class.create();
TransView.prototype = {
  initialize: function(arrList, idShow, idList, idText, options) {
    if(!arrList || arrList.length == 0) return;
    var oThis = this, oShow = $(idShow), oList = $(idList), oText = $(idText), img = document.createElement("img"), a = document.createElement("a");
    //初始化显示区域
    img.src = "javascript:;"; a.target = "_blank"; if(isIE){ img.style.filter = "revealTrans(duration=1)"; };
    a.appendChild(img); oShow.appendChild(a);

    this._oList = oList;
    this._oText = oText;
    this._list = arrList;
    this._img = img;
    this._a = a;
    this._timer = null;
    this._index = -1;
    
    this.SetOptions(options);
    
    this.Time = Math.abs(this.options.Time);
    this.Auto = !!this.options.Auto;
    this.ClassOn = this.options.ClassOn;
    this.ClassOff = this.options.ClassOff;
    
    this.Set();
  },
  //设置默认属性
  SetOptions: function(options) {
    this.options = {//默认值
      ClassOn:        "",//显示时样式
      ClassOff:        "",//不显示时样式
      Auto:            true,//是否自动切换
      Time:            5000//切换时间
    };
    Object.extend(this.options, options || {});
  },
  //设置
  Set: function() {
    this.Each(function(list, i){
        var oThis = this, img = document.createElement("img");
        img.src = list["img"];
        img.alt = list["text"];
        img.onmouseover = function(){ oThis.Show(i); };
        img.onmouseout = function(){ if(oThis.Auto){ oThis._timer = setTimeout(function(){ oThis.Run(); }, oThis.Time); } };
        this._list[i]["obj"] = img;
        //这里封装的不好
        this._oList.appendChild(img);
    });
    
    this.Run();
  },
  //显示
  Show: function(i) {
    this.Stop();
    
    if(i < 0 || i >= this._list.length) i = 0;
    if(isIE){
        this._img.filters.revealTrans.Transition = Math.floor(Math.random() * 23);
        this._img.filters.revealTrans.apply();
        this._img.filters.revealTrans.play();
    }
    
    this._img.src = this._list[i]["img"];
    this._img.alt = this._list[i]["text"];
    
    if(!this._list[i]["url"]){
        this._oText.innerHTML = this._list[i]["text"];
        this._a.removeAttribute("href");
    } else {
        this._oText.innerHTML= "<a href='" + this._list[i]["url"] + "' target='_blank'>" + this._list[i]["text"] + "</a>";
        this._a.href = this._list[i]["url"];
    }
    
    if(this._index >= 0) this._list[this._index]["obj"].className = this.ClassOff;
    this._list[i]["obj"].className = this.ClassOn;
    this._index = i;
  },
  //开始
  Run: function() {
    this.Show(this._index + 1);
    if(this.Auto){ var oThis = this; this._timer = setTimeout(function(){ oThis.Run(); }, oThis.Time); }
  },
  //停止
  Stop: function() {
    clearTimeout(this._timer);
  },
  //
  Each:function(fun) {
    for (var i = 0, len = this._list.length; i < len; i++)
        fun.call(this, this._list[i], i);
  }
};