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, tabName, parameter, count, options) {
	if(parameter <= 0 || count <= 0) return;
	var oContainer = $('#' + container)[0], oSlider = $('#' + slider)[0], oThis = this;
	this.Index = 0;//当前索引
	this._timer = null;//定时器
	this._slider = oSlider;//滑动对象
	this._tabName=tabName;
	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:		5,//滑动变化率
		Time:		10,//滑动延时
		Auto:		true,//是否自动转换
		Pause:		6000,//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) { this._timer = setTimeout(function(){ 
			oThis.Index++; 
			oThis.Start(); 
			setTabInner(oThis._tabName, oThis.Index + 1, 5);
			}, 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";
  }
};

function setTabInner(name,cursel, n){
 for(i=1;i<=n;i++){
  var con=document.getElementById("con_"+name+"_"+i);
  if (con)
  	con.style.display=i==cursel?"block":"none";
 }
}

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