JS中简单的实现像C#中using功能（有源码下载）
先看看使用页面是如何调用的。
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> neverModules Using Function - http://www.never-online.net </title>
<meta http-equiv="ImageToolbar" content="no" />
<meta name="author" content="never-online, BlueDestiny"/>
<meta name="keywords" content="never modules, Mozilla CSS, C#, .net, Reference, BlueDestiny, never-online"/>
<meta name="description" content="javascript reference, c sharp artilces"/>
<meta name="creator.name" content="never-online, BlueDestiny" />
<style type="text/css" media="all" title="Default">
body {
font:9pt "Verdana";
}
</style>
<script type="text/javascript" src="System/system.js"></script>
<script type="text/javascript">
//<![CDATA[
Using("System.Utils.Jsclass");
var jsclass = new Jsclass();
jsclass.toString();
//]]>
</script>
</head>
<body id="www.never-online.net">
<p align="center">Power By never-online</a>
</body>
</html>
再看看System.Utils.Jsclass这个命名空间是如何的。
var System = {}; System.Utils = {};
System.Utils.Jsclass = function() {
this.name = "jsclass";
this.functions = "Using function test.";
System.Utils.Jsclass.prototype.toString = function() {
document.write(this.functions);
}
}
接下来就是主要的Using这个函数了
var Using = function (sNamespace, bUseCache) {
bUseCache = bUseCache===true;
var x=!!document.all?new ActiveXObject("MSXML2.XMLHTTP"):new XMLHttpRequest();
var shortname = sNamespace.substring(sNamespace.lastIndexOf(".")+1);
sNamespace = sNamespace.replace(/\./g,"/")+".js";
x.open("GET", sNamespace+(bUseCache?"?x="+Math.random():""), false);
x.send(null); var code = x.responseText;
window[shortname]=window.eval(code);
}
