javascript全局变量封装模块实现代码

下面的代码是我的测试代码，注释很重要：
复制代码代码如下:
/*global window,jQuery,validate_email,masterUI,$,rest*/
/** Enable ECMAScript "strict" operation for this function. See more:
* http://ejohn.org/blog/ecmascript-5-strict-mode-json-and-more/
* http://stackoverflow.com/questions/5020479/what-advantages-does-using-functionwindow-document-undefined-windo
* Q1: Why are window and document being fed instead of just being accessed normally？
* A1: Generally to fasten the identifier resolution process, having them as local variables can help （although IMO the performance improvements may be negligible）.
* A2: Passing the global object is also a widely used technique on non-browser environments, where you don"t have a window identifier at the global scope, e.g.:
* （function （global） {
* //..
* }）（this）; // this on the global execution context is the global object itself
* A3: Passing window and document allows the script to be more efficiently minified
*
* Q2: Why the heck is undefined being passed in？
* A1: This is made because the undefined global property in ECMAScript 3, is mutable, meaning that someone could change its value affecting your code, for example:
* undefined = true; // mutable
* （function （undefined） {
* alert（typeof undefined）; // "undefined", the local identifier
* }）（）; // <-- no value passed, undefined by default
* If you look carefully undefined is actually not being passed （there"s no argument on the function call）,
* that"s one of the reliable ways to get the undefined value, without using the property window.undefined.
*
*/
（function（window, document, undefined） {
"use strict";
window.test = {
init: function （） {
"use strict";
alert（"ok"）;
}
};
}）（window, document）;// no undefined parameter here to avoid using mutable window.undefined changed by other guy

1.说明，参考了一篇文章和stackoverflow上的一个帖子
2.（function（）{}）（）这种代码写在独立的js文件里，当js文件被html加载的时候，该函数就会执行。实际上创建了windows.text对象。
以后html代码就可用test.init的形式调用方法。
测试html部分代码如下：
复制代码代码如下:
[plain] view plaincopyprint？
<head>
<title>AppEngine SDK</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="../../master/script/third_party/jquery-1.8.0.min.js"></script>
<script type="text/javascript" src="../../master/plugin/jquery-validation-1.9.0/jquery.validate.js"></script>
<script type="text/javascript" src="../../master/plugin/artDialog4.1.6/jquery.artDialog.js"></script>
<script type="text/javascript" src="../../master/script/app/test.js"></script>
<script type="text/javascript">
$（document）.ready（function（） {
test.init（）;
}）
</script>
</head>

3.Jslint会报两个问题，一是关于undefined的，没找到什么好方法，任它抱怨吧。另一格式最后调用方式要改成：
复制代码代码如下:
[javascript] view plaincopyprint？}（window, document））; }（window, document））;

无所谓了，就任由它吧。只要功能正常就行。