可利用該語法來處理：new ActiveXObject("Scripting.FileSystemObject")
看到有些人不推這種方式，但是應用於內網，所以安全性設定可以統一佈署，這個問題倒是不難處理。
Check 上傳檔案大小 (內有說明優缺點及詳細範例，擷錄部份文章如下)
使用時會跳出下列警告視窗，不是很方便
JavaScript Essence: 安全限制
http://openhome.cc/Gossip/JavaScript/SecurityConstraint.html
js到底能不能判断客户端上传文件的大小
http://bbs.csdn.net/topics/280043968
function getFileSize(filepath) { //這段可正常運作！
if(window.ActiveXObject){
var fso=new ActiveXObject("Scripting.FileSystemObject");
var file=fso.GetFile(filepath);
filesize=file.size;
}
}
Check file size with Javascript
http://bytes.com/topic/javascript/answers/460516-check-file-size-javascript
上傳檔案前，JavaScript檢查檔案格式、大小（只針對圖片）
http://www.dotblogs.com.tw/topcat/archive/2009/02/20/7250.aspx
Javascript的FileSystemObject功能
http://www.code-club.idv.tw/index.php?action=index&run=article_read&ClassID=37&ArticleID=1538
http://big5.sj33.cn/jc/wyjc/jsjc/200610/10075.html
http://www.coolsun.idv.tw/modules/xhnewbb/viewtopic.php?topic_id=1100
引用文章：http://www.w3schools.com/asp/asp_ref_filesystem.asp
>> 可以查一下FSO的相關參數使用。
The FileSystemObject Object
The FileSystemObject object is used to access the file system on a server.
This object can manipulate files, folders, and directory paths. It is also possible to retrieve file system information with this object.
The following code creates a text file (c:\test.txt) and then writes some text to the file:
dim fs,fname
set fs=Server.CreateObject("Scripting.FileSystemObject")
set fname=fs.CreateTextFile("c:\test.txt",true)
fname.WriteLine("Hello World!")
fname.Close
set fname=nothing
set fs=nothing
%>
The FileSystemObject object's properties and methods are described below:
Properties
| Property | Description |
|---|---|
| Drives | Returns a collection of all Drive objects on the computer |
Methods
| Method | Description |
|---|---|
| BuildPath | Appends a name to an existing path |
| CopyFile | Copies one or more files from one location to another |
| CopyFolder | Copies one or more folders from one location to another |
| CreateFolder | Creates a new folder |
| CreateTextFile | Creates a text file and returns a TextStream object that can be used to read from, or write to the file |
| DeleteFile | Deletes one or more specified files |
| DeleteFolder | Deletes one or more specified folders |
| DriveExists | Checks if a specified drive exists |
| FileExists | Checks if a specified file exists |
| FolderExists | Checks if a specified folder exists |
| GetAbsolutePathName | Returns the complete path from the root of the drive for the specified path |
| GetBaseName | Returns the base name of a specified file or folder |
| GetDrive | Returns a Drive object corresponding to the drive in a specified path |
| GetDriveName | Returns the drive name of a specified path |
| GetExtensionName | Returns the file extension name for the last component in a specified path |
| GetFile | Returns a File object for a specified path |
| GetFileName | Returns the file name or folder name for the last component in a specified path |
| GetFolder | Returns a Folder object for a specified path |
| GetParentFolderName | Returns the name of the parent folder of the last component in a specified path |
| GetSpecialFolder | Returns the path to some of Windows' special folders |
| GetTempName | Returns a randomly generated temporary file or folder |
| MoveFile | Moves one or more files from one location to another |
| MoveFolder | Moves one or more folders from one location to another |
| OpenTextFile | Opens a file and returns a TextStream object that can be used to access the file |
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