if(typeof PicFocusManager == "undefined")
    {
        PicFocusManager =[];
    }
    function PicHead(imageContainerID,textContainerID,buttonContainerID,intervarTime){
        this.$ = function (id){return document.getElementById(id)}
        this.index = PicFocusManager.length;
        PicFocusManager[PicFocusManager.length] = this;
        this.imageContainer = this.$(imageContainerID);
        this.textContainer = this.$(textContainerID);
        this.buttonContainer = this.$(buttonContainerID);
        this.firstShow = 0; //默认显示项
        this.interval = (isNaN(intervarTime)?0:intervarTime) || 5000;
         //切换时间
        this.canAutoPlay = true; //是否可以自动切换
        this.currentPosition = this.firstShow;
        this.timer;
        this.images = [];
        this.texts = [];
        this.buttons = [];
        this.bindEvent = function(){
            var _self = this;
            for(var i=0;i<this.images.length;i++){
                this.images[i].onmouseover = function(){
                    _self.stop();
                }
                this.images[i].onmouseout = function(){
                    _self.play();
                }
            }
            for(var i=0;i<this.buttons.length;i++){
                this.buttons[i].onclick = function(){
                    _self.focus(this);
                }
            }
        }
        this.play = function(){
            if(this.canAutoPlay){
                this.setFocus(this.currentPosition ++ )
                if(this.currentPosition >= this.images.length)this.currentPosition =0 ;
                this.timer = setTimeout('PicFocusManager[' + this.index + '].play()' , this.interval )
            }
        }
        this.stop = function(){
            clearTimeout( this.timer );
        }
        this.focus = function(button){
            for(var i=0;i<this.buttons.length;i++){
                if(this.buttons[i] == button){
                    this.currentPosition = i;
                    this.setFocus(this.currentPosition);
                    break;
                }
            }
        }
        this.setFocus = function(i){
            try{
                this.imageContainer.filters[0].apply();
                this.imageContainer.filters[0].play();
            }catch(e){}
            for(var j=0;j<this.images.length;j++){
                this.images[j].style.display = (i==j)?"":"none";
            }
            for(var j=0;j<this.texts.length;j++){
                this.texts[j].style.display = (i==j)?"":"none";
            }
            for(var j=0;j<this.buttons.length;j++){
                this.buttons[j].className = (i==j)? this.buttons[j].getAttribute("focusClass") :this.buttons[j].getAttribute("normalClass");
            }
            try{  //滤镜版本
                new ActiveXObject("DXImageTransform.Microsoft.Fade");
                this.imageContainer.filters[0].play();
            }catch(e){}
        }
        this.init = function(){
            if(this.imageContainer && this.imageContainer && this.imageContainer){
                //init
                this.images=this.imageContainer.getElementsByTagName("img");
                this.texts=this.textContainer.getElementsByTagName("label");
                this.buttons=this.buttonContainer.getElementsByTagName("a");
                this.bindEvent();
                for(var i=0;i<this.images.length;i++){
                    this.images[i].style.display = "none";
                    this.texts[i].style.display = "none";
                    this.buttons[i].className = this.buttons[i].getAttribute("normalClass");
                }
                this.images[this.firstShow].style.display = "";
                this.texts[this.firstShow].style.display = "";
                this.buttons[this.firstShow].className = this.buttons[this.firstShow].getAttribute("focusClass");
            }else{
                alert("未提供正确的参数")
            }
        }
    }