1internal static string GetScriptLocation(HttpContext context)
2...{
3      string text1 = null;
4      IDictionary dictionary1 = (IDictionary) context.GetConfig("system.web/webControls");
5      if (dictionary1 != null)
6      ...{
7            text1 = (string) dictionary1["clientScriptsLocation"];
8      }
9      if (text1 == null)
10      ...{
11            throw new HttpException(HttpRuntime.FormatResourceString("Missing_clientScriptsLocation"));
12      }
13      if (text1.IndexOf("{0}") >= 0)
14      ...{
15            string text2 = "system_web";
16            string text3 = VersionInfo.IsapiVersion.Substring(0, VersionInfo.IsapiVersion.LastIndexOf('.')).Replace('.', '_');
17            text1 = string.Format(text1, text2, text3);
18      }
19      return text1;
20}

　　然后再machine.config中找到了默认的配置：
　　<webControls clientScriptsLocation="/aspnet_client/{0}/{1}/" />
　　当然也可以在web.config中针对单个应用程序进行配置。如果要把aspnet_client目录放在根目录下的myweb中，那么就在web.config文件的
<configuration> 
    <system.web>
标签内加上这么一句：
    <webControls clientScriptsLocation="/myweb/aspnet_client/{0}/{1}/" />
　　或者直接写
    <webControls clientScriptsLocation="/myweb/aspnet_client/system_web/1_1_4322/" />
　　就可以了。