//需要引用别的js的时候，就加上如Env.require("cookie.js")，或Env.require("/common/cookie.js")，是用相对路径还是绝对路径就看喜好了。
//Env.require可用在页面模板中，也可用在js文件中，但一定要保证执行时env.js被显式引入。
//多次Env.require同一个js（不管用相对还是绝对），只有第一次会加载，所以不会重复。//程序最后发行的版本，用于作为缓存键的前缀，快速更新缓存
var envLastVer = '2014_11_17_17_03';//用于存放通道名称及通信对象的类，这样可以通过不同通道名称来区分不同的通信对象
function HttpRequestObject() {this.chunnel = null;this.instance = null;
}//用于获取的脚本或css文件保存对象
function HttpGetObject() {this.url = null;        //要下载的文件路径this.cache_key = null;  //缓存键this.chunnel = null;    //通道名this.type = null;       //类型，js或cssthis.is_fill = false;   //内容是否被填充this.is_exec = false;   //内容是否已被执行，防止分几大块载入后重复执行
}//通信处理类，可以静态引用其中的方法
var Request = new function () {//通信类的缓存  this.httpRequestCache = new Array();//创建新的通信对象 this.createInstance = function () {var instance = null;if (window.XMLHttpRequest) {//mozilla  instance = new XMLHttpRequest();//有些版本的Mozilla浏览器处理服务器返回的未包含XML mime-type头部信息的内容时会出错。//因此，要确保返回的内容包含text/xml信息  if (instance.overrideMimeType) {instance.overrideMimeType = "text/xml";}}else if (window.ActiveXObject) {//IE  var MSXML = ['MSXML2.XMLHTTP.5.0', 'Microsoft.XMLHTTP', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];for (var i = 0; i < MSXML.length; i++) {try {instance = new ActiveXObject(MSXML[i]);break;}catch (e) {}}}return instance;}/**  * 获取一个通信对象  * 若没指定通道名称，则默认通道名为"default"  * 若缓存中不存在需要的通信类，则创建一个，同时放入通信类缓存中  * @param _chunnel：通道名称，若不存在此参数，则默认为"default"  * @return 一个通信对象，其存放于通信类缓存中  */this.getInstance = function (_chunnel) {var instance = null;var object = null;if (_chunnel == undefined)//没指定通道名称
        {_chunnel = "default";}var getOne = false;for (var i = 0; i < this.httpRequestCache; i++) {object = HttpRequestObject(this.httpRequestCache[i]);if (object.chunnel == _chunnel) {if (object.instance.readyState == 0 || object.instance.readyState == 4) {instance = object.instance;}getOne = true;break;}}if (!getOne) //对象不在缓存中，则创建
        {object = new HttpRequestObject();object.chunnel = _chunnel;object.instance = this.createInstance();this.httpRequestCache.push(object);instance = object.instance;}return instance;}/**  * 客户端向服务端发送请求  * @param _url:请求目的  * @param _data:要发送的数据  * @param _processRequest:用于处理返回结果的函数，其定义可以在别的地方，需要有一个参数，即要处理的通信对象  * @param _chunnel:通道名称，默认为"default"  * @param _asynchronous:是否异步处理，默认为true,即异步处理* @param _paraObj:相关的参数对象 */this.send = function (_url, _data, _processRequest, _chunnel, _asynchronous, _paraObj) {if (_url.length == 0 || _url.indexOf("?") == 0) {alert("由于目的为空，请求失败，请检查！");return;}if (_chunnel == undefined || _chunnel == "") {_chunnel = "default";}if (_asynchronous == undefined) {_asynchronous = true;}var instance = this.getInstance(_chunnel);if (instance == null) {alert("浏览器不支持ajax，请检查！")return;}if (_asynchronous == true && typeof (_processRequest) == "function") {instance.onreadystatechange = function () {if (instance.readyState == 4) // 判断对象状态
                {if (instance.status == 200) // 信息已经成功返回，开始处理信息
                    {_processRequest(instance, _paraObj);}else {alert("您所请求的页面有异常，请检查！");}}}}//_url加一个时刻改变的参数，防止由于被浏览器缓存后同样的请求不向服务器发送请求  if (_url.indexOf("?") != -1) {_url += "&requestTime=" + (new Date()).getTime();}else {_url += "?requestTime=" + (new Date()).getTime();}if (_data.length == 0) {instance.open("GET", _url, _asynchronous);instance.send(null);}else {instance.open("POST", _url, _asynchronous);instance.setRequestHeader("Content-Length", _data.length);instance.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");instance.send(_data);}if (_asynchronous == false && typeof (_processRequest) == "function") {_processRequest(instance, _paraObj);}}
}var Env = new function () {this.needLoadObject = new Array();//获取env.js文件所在路径this.envPath = null;this.getPath = function () {this.envPath = document.location.pathname;this.envPath = this.envPath.substring(0, this.envPath.lastIndexOf("/") + 1);var _scripts = document.getElementsByTagName("script");var _envPath = null;var _scriptSrc = null;for (var i = 0; i < _scripts.length; i++) {_scriptSrc = _scripts[i].getAttribute("src");if (_scriptSrc && _scriptSrc.indexOf("env.js") != -1) {break;}}if (_scriptSrc != null) {if (_scriptSrc.charAt(0) == '/') {this.envPath = _scriptSrc.substr(0, _scriptSrc.length - 6);}else {this.envPath = this.envPath + _scriptSrc.substr(0, _scriptSrc.length - 6);}}}this.getPath();//获取文件后缀名this.getFileExt = function (fileUrl) {var d = /\.[^\.]+$/.exec(fileUrl);return d.toString().toLowerCase();}//依次放入要载入的文件this.pushNeedLoad = function (url) {var _absUrl = null;if (url.charAt(0) == '/')_absUrl = url;else_absUrl = this.envPath + url;var object = new HttpGetObject();object.url = _absUrl;object.cache_key = envLastVer + _absUrl;    //利用版本号+绝对路径生成缓存键object.chunnel = 'ch' + (this.needLoadObject.length + 1);object.type = this.getFileExt(_absUrl);//尝试从缓存获取var cacheContent = localStorage.getItem(object.cache_key);if (cacheContent) { object.is_fill = true; }this.needLoadObject.push(object);return this;}//依次装载要处理的文件this.batchLoad = function () {for (var i = 0; i < this.needLoadObject.length; i++) {var item = this.needLoadObject[i];var processGet = function (_instance, _paraObj) {localStorage.setItem(_paraObj.cache_key, _instance.responseText);    //缓存文件_paraObj.is_fill = true;}if (item.is_fill == false) {Request.send(item.url, "", processGet, item.chunnel, false, item);  //采用同步方式载入
            }}return this;}//依次执行要处理的文件this.batchExec = function () {var runCss = function (_css) { document.write('<style type="text/css">' + _css + '</style>'); }var runJs = function (_js) {if (window.execScript)window.execScript(_js);elsewindow.eval(_js);}//依次执行，由于js为单线程执行，每执行一个js都会阻塞其它，所以可以保证顺序执行for (var i = 0; i < this.needLoadObject.length; i++) {var item = this.needLoadObject[i];if (item.is_exec == false) {if (item.type == '.js') {runJs(localStorage.getItem(item.cache_key));item.is_exec = true;  //标记已执行，下次不会再执行
                }else if (item.type == '.css') {runCss(localStorage.getItem(item.cache_key));item.is_exec = true;  //标记已执行，下次不会再执行
                }}}}
}

Env.pushNeedLoad("jquery.mobile-1.4.5/jquery.min.js").pushNeedLoad("jquery.mobile-1.4.5/jquery.mobile-1.4.5.min.css").pushNeedLoad("/plus_in/weixin/procedure/scripts/task.util.js").pushNeedLoad("/plus_in/weixin/procedure/scripts/emcp.mobile.js").pushNeedLoad("/plus_in/weixin/procedure/scripts/common.index.js").pushNeedLoad("jquery.mobile-1.4.5/jquery.mobile-1.4.5.min.js").pushNeedLoad("mobiscroll.2.6/css/mobiscroll.custom-2.6.2.min.css").pushNeedLoad("mobiscroll.2.6/js/mobiscroll.custom-2.6.2.min.js").pushNeedLoad("/plus_in/weixin/procedure/style/base.css").batchLoad().batchExec();