js读取本地文件（转）

http://www.oschina.net/code/snippet_112667_4556

<script type="text/javascript">
function read(file) {
	if(typeof window.ActiveXObject != 'undefined') {
		var content = "";
		try {
			var fso = new ActiveXObject("Scripting.FileSystemObject");  
			var reader = fso.openTextFile(file, 1);
			while(!reader.AtEndofStream) {
				content += reader.readline();
				content += "\n";
			} 
			// close the reader
			reader.close();
		}
		catch (e) { 
			alert("Internet Explore read local file error: \n" + e); 
		}
		
		return content;
	}
    else if(document.implementation && document.implementation.createDocument) {
		var content = ""
		try {
			netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
			var lf = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
			lf.initWithPath(file);
			if (lf.exists() == false) {  
                alert("File does not exist");  
            } 
			
            var fis = Components.classes["@mozilla.org/network/file-input-stream;1"].createInstance(Components.interfaces.nsIFileInputStream);  
            fis.init(lf, 0x01, 00004, null);  
            var sis = Components.classes["@mozilla.org/scriptableinputstream;1"].createInstance(Components.interfaces.nsIScriptableInputStream);  
            sis.init(fis);  
            var converter = Components.classes["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(Components.interfaces.nsIScriptableUnicodeConverter);  
            converter.charset = "UTF-8";  
            content = converter.ConvertToUnicode(sis.read(sis.available()));
		}
		catch (e) { 
			alert("Mozilla Firefox read local file error: \n" + e); 
		}
		
		return content;
	}
}
</script>