var sScrollTop = document.body.scrollTop || document.documentElement.scrollTop,
    sWindow_h = document.documentElement.clientHeight,
    t_h = parseInt(this.getCss(this.getId('gy_photoBox_head'),'height')),
    hold_h = sWindow_h - t_h - 20,
    width = this.nImgWidth ,
    height = this.nImgHeight;　　

windowResize:function(){
            var _that = this,
                _timer = null;
            // 函數節流 
            window.onresize = function(){
                clearTimeout(_timer);
                _timer = setTimeout(function(){
                    if( _that.tools.getId('gy_photoBox')){
                        _that.setBoxCss();
                    }

 

                },100);
            }        
        }

/*
        @ src [String] 圖片的地址
        @ success [Function] 圖片加載成功的回調函數
        @ error [Function] 圖片加載失敗的回調函數
        */
        imgLoading:function(opt){ 
            var _img = new Image(),
                _that = this;
            _img.onload = function(){
                _that.nImgWidth = this.width;
                _that.nImgHeight = this.height;
                if(typeof opt.success == 'function'){
                    setTimeout(function(){
                        opt.success();
                    },300);
                }
            }
            _img.onerror = function(){
                if(typeof opt.error){
                    opt.error();
                }            
            }
            // 注意：要放在onload事件下面，否則ie會出現BUG
            _img.src = opt.src;
        }

/*
author:laoguoyong
*/
(function(){
    /* -------------------------簡單的選擇器-----------------------
    @ 參數 [string] 
    ---------------------------------------
    ★-只支持以下選擇-★
    @ 支持一級選擇器：如'#id','.class','p'
    @ 支持后代選擇，如 '.class p','body span'
    @ 支持子元素選擇，如 '.class>p','body>span'
    ----------------------------------------
    @ return [Array]
    */
    var selector = function(str){
        // 定義元素數組
        var elem = [];
        /* 私有方法
        ------------------------*/
        //返回是id的元素
        function _getId(id){
            return document.getElementById(id);
        }
        //返回存在此類名的元素-元素
        function _getByClassName(className,parent){
            var class_array = [],
                node = parent != undefined&&parent.nodeType==1?parent.getElementsByTagName('*'):document.getElementsByTagName('*'),
                reg = new RegExp("(^|//s)"+className+"(//s|$)");
            for(var n=0,i=node.length;n<i;n++){
                if(reg.test(node[n].className)){
                    class_array.push(node[n]);
                }
            }
            return class_array;
        }
        //一級選擇，如 '#id','p','.class'
        // return [Array]
        function _getDom(s){
            var array_elem = [];
            if (s.indexOf('#')==0){
                array_elem.push(_getId(s.slice(1)));
            }
            else if(s.indexOf('.')==0){
                array_elem = array_elem.concat(_getByClassName(s.slice(1)));
            }
            else{
                var tag = document.getElementsByTagName(s);
                for(var n=0,i=tag.length;n<i;n++){
                    array_elem.push(tag[n]);
                }
            }
            return array_elem;
        }
        /*
        @ arry_elm [Array] : 元素數組，如 ['.demo','p'] ，選擇的是.demo下面的p元素，至于是選擇后代還是子代，請看第2個參數解釋
        @ r [String] -可選（不傳默認為選擇后代）: '>'，是選擇子代元素;
        --------------------------
        @ return [Array]
        */
        function _query(array_elem,r){
            var node = array_elem,
                type_name = node[0].match(//#/)?'id_'+node[0].slice(1):node[0].match(//./)?'className_'+node[0].slice(1):'tagName_'+node[0],
                child = _getDom(node[1]),
                type = type_name.split('_'),
                len = document.getElementsByTagName('*').length,
                reg = new RegExp("(^|//s)"+type[1]+"(//s|$)");;
            for(var i=0,j=child.length;i<j;i++){
                var par = child[i].parentNode;
                for(var n=0;n<len;n++){
                    if(par.nodeType == 9){
                        break;
                    }
                    if(reg.test(par[type[0]])){
                        elem.push(child[i]);
                        break;                    
                    }else{
                        if(r == '>') break;
                        par = par.parentNode;
                    }        
                }
            }
        }
        /* 接口
        -----------------------*/
        var elemStr = str.replace(/(^/s+)|(/s+$)/,'');
        if(document.querySelectorAll){
            var dom = document.querySelectorAll(elemStr);
            for(var n=0,len=dom.length;n<len;n++){
                elem.push(dom[n]);
            }
        }else{
            var    split = /[/>/s]/g.exec(elemStr);
            if(split){
                var node = elemStr.split(split[0]);
                _query(node,split[0]);
            }else{
                elem = elem.concat( _getDom(elemStr) );
            }
        }
        return elem;
    }
    /* 彈窗功能構造函數
    -----------------------*/
    function LGY_photoBox(option){
        this.opt = option;
        this.oTarget = typeof option.target == 'object'?option.target:selector(option.target);
        if(!this.oTarget) return;
        this.nLen = this.oTarget.length; //總個數
        this.aBigimg_src = []; //大圖數據數組
        this.aTitle = []; //標題數據數組
        this.nIndex = 0; //索引
        this.nImgWidth = 0; //動態獲取圖片的寬
        this.nImgHeight = 0; //動態獲取圖片的高
        this.nDelay = 0.2;
        this.intit();
    }
    LGY_photoBox.prototype = {
        intit:function(){
            var _that = this;
            this.getData();
            for(var n=0;n<this.nLen;n++){
                this.oTarget[n].index = n;
                this.oTarget[n].onclick = function(e){
                    _that.createCover();
                    var e = _that.tools.getEvent(e),
                        target = _that.tools.getTarget(e);
                    // 設置瀏頁面沒有滾動條出現
                    _that.tools.setCss(document.documentElement,{'height':'100%','overflow-y':'hidden','overflow-x':'hidden'});
                    // 獲取當時索引
                    _that.nIndex = this.index;
                    //首次判斷
                    _that.firstLoad(_that.aBigimg_src[_that.nIndex],function(){
                        //插入結構
                         _that.createBoxDom();
                        //關閉
                        _that.tools.getId('gy_photoBox_close').onclick = function(){
                            _that.removeBox();                                    
                        }
                        // 判斷左右按鈕顯示
                        _that.btnIsShow();    
                        // 上一張
                        _that.btnPrev();
                        // 下一張
                        _that.btnNext();
                        // 加載圖片
                        _that.imgChange(_that.aBigimg_src[_that.nIndex]);
                    });
                    // 重置窗口大小
                    _that.windowResize();
                     // 鍵盤事件
                    _that.keyEvent();
                    //阻止跳轉
                    return false;    
                }
            }
        },
        createBoxDom:function(){
            var doc = document,
                exHtml = '',
                boxHtml = doc.createElement('div');
            boxHtml.id = 'gy_photoBox';
            doc.body.appendChild(boxHtml);
            if(typeof this.opt.appendHTML == 'string'){
                exHtml = this.opt.appendHTML;
            }
            boxHtml.innerHTML = '<div id="gy_photoBox_prev"></div>'+
                            '<div id="gy_photoBox_next"></div>'+
                            '<span id="gy_photoBox_close"></span>'+
                            '<div id="gy_photoBox_head">'+exHtml+'</div>'+
                            '<div id="gy_photoBox_main">'+
                                '<img id="gy_photoBox_img_loading" src="http://www.pconline.com.cn/blank.gif" />'+
                                '<img id="gy_photoBox_img" />'+
                                '<div id="gy_photoBox_infor">'+
                                    '<span id="gy_photoBox_num">'+
                                        '<strong id="gy_photoBox_index"></strong>'+
                                        '/'+this.nLen+
                                    '</span>'+
                                    '<p id="gy_photoBox_title"></p>'+
                                '</div>'+
                            '</div>';
        },
        createCover:function(){
            // 創建覆蓋層
            var    doc = document,
                coverHtml = doc.createElement('div');
                coverHtml.id = 'gy_photoBox_cover';
            doc.body.appendChild(coverHtml);
            //設置覆蓋層的樣式
            this.tools.setCss(this.tools.getId('gy_photoBox_cover'),{'height':(doc.body.scrollTop || doc.documentElement.scrollTop)+(doc.documentElement.clientHeight)+'px'});
        },
        setBoxCss:function(){
            var    doc = document,
                nScrollTop = doc.body.scrollTop || doc.documentElement.scrollTop,
                nWindow_h = doc.documentElement.clientHeight,
                eBox_head_h = this.tools.getId('gy_photoBox_head').clientHeight,
                eBox = this.tools.getId('gy_photoBox'),
                eBoxPadding = 10,
                hold_h = nWindow_h - eBoxPadding - 50 - eBox_head_h,
                width = this.nImgWidth ,
                height = this.nImgHeight;
            // alert('nWindow_h:'+nWindow_h+'-'+'eBoxPadding:'+eBoxPadding+'-'+'eBox_head_h:'+eBox_head_h);
            // 圖片大小超過可見范圍，進行縮放 
            if(this.nImgHeight>hold_h){
                height = hold_h,
                width = Math.ceil(this.nImgWidth*(height/this.nImgHeight));
            }
            //設置盒子在整個頁面居中
            this.tools.setCss(eBox,{'width':width+'px',
                                    'height':eBox_head_h + height + 'px',
                                    'margin-left':-(width+eBoxPadding)/2+'px',
                                    'top':nScrollTop+(nWindow_h-height-eBoxPadding)/2+'px'});
            this.tools.setCss(this.tools.getId('gy_photoBox_main'),{'width':width+'px','height':height + 'px'});
            //設置覆蓋層的樣式
            this.tools.setCss(this.tools.getId('gy_photoBox_cover'),{'height':nScrollTop+doc.documentElement.clientHeight+'px'});
        },
        removeBox:function(){
            var doc = document;
            if(this.tools.getId('gy_photoBox')){
                doc.body.removeChild(this.tools.getId('gy_photoBox'));
            }
            if(this.tools.getId('gy_photoBox_cover')){
                document.body.removeChild(this.tools.getId('gy_photoBox_cover'));
            }
            this.tools.setCss(document.documentElement,{'height':'auto','overflow-y':'auto','_overflow-y':'scroll','overflow-x':'auto'});
        },
        getData:function(){
            for(var n=0;n<this.nLen;n++){
                var src = this.oTarget[n].getAttribute('href'),
                    src="/uploads/allimg/150112/122P96163-0.jpg" style="border: 1px solid rgb(204, 204, 204); padding: 3px; max-width: 620px; overflow: hidden;" />