var adForm = {};
 adForm.$ = 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 = {   
  //��������,��������,�����,�����   
  initialize: function(container, slider, parameter, count, options) {
    if(parameter <= 0 || count <= 0) return;   
    var oContainer = adForm.$(container), oSlider = adForm.$(slider), oThis = this;   
  
    this.Index = 0;//��ǰ����   
       
    this._timer = null;//��ʱ��   
    this._slider = oSlider;//��������   
    this._parameter = parameter;//�����   
    
    if(count && (typeof count ) == "number" && count > 0){
    	this._count = count ;//�����   
    }
   // this._count = count || 0;//�����   
    this._target = 0;//Ŀ�����   
    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;   
  },   
  //����Ĭ������   
  SetOptions: function(options) {   
    this.options = {//Ĭ��ֵ   
        Up:         true,//�Ƿ�����(��������)   
        Step:       7,//�����仯��   
        Time:       35,//������ʱ   
        Auto:       true,//�Ƿ��Զ�ת��   
        Pause:      2000,//ͣ��ʱ��(AutoΪtrueʱ��Ч)   
        onStart:    function(){},//��ʼת��ʱִ��   
        onFinish:   function(){}//���ת��ʱִ��   
    };   
    Object.extend(this.options, options || {});   
  },   
  //��ʼ�л�����   
  Start: function() {   
	// alert(this._count);
    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;   
    //alert(this._target);
    this.onStart();   
    this.Move();   
  },   
  //�ƶ�   
  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(); }, this.Pause); }   
    }   
  },   
  //��ȡ����   
  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;   
  },   
  //ֹͣ   
  Stop: function(iTarget, iNow) {   
    clearTimeout(this._timer);   
    
    this._slider.style[this.Up ? "top" : "left"] = this._target + "px";   
  }   
};   

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

adForm.ready = function(containerId,sliderId,slidWidth,slidSteps,handlerObjs,handlerOnClassName,isUp){
  // alert(slidSteps);
	var objs2 = handlerObjs;
    var tv2 = new TransformView(containerId, sliderId, slidWidth, slidSteps, {   
        onStart: function(){ adForm.Each(objs2, function(o, i){ o.className = tv2.Index == i ? "on" : ""; }) },
        Up: isUp  
    });   
       
    tv2.Start();   
      
  
    adForm.Each(objs2, function(o, i){   
        o.onmouseover = function(){   
        	$(o).siblings().removeClass("on");
            o.className = "on";   
            tv2.Auto = false;  
            tv2.Index = i; 
            tv2._target = -1 * tv2._parameter * i;   
            //tv2.Start();
            tv2.Stop();
        }   
        o.onmouseout = function(){   
            o.className = "";   
            tv2.Auto = true;   
            tv2.Start();   
        }   
    });
    
    
    $("#"+sliderId).children("li").hover(function(){
    	 var index = $("#"+sliderId).children("li").index(this);
    	// alert(index);
    	 tv2.Auto = false;   
         tv2.Index = index; 
    	 tv2._target = -1 * tv2._parameter * index;  
         tv2.Stop();
      },
       function(){ 
    	  tv2.Auto = true;   
          tv2.Start();  
      } );
};