ActivexObject - Read Text File Only In IE

I am using ActiveXObject to read a text file using javascrilpt, it is working in IE but when i use in other browsers, it is not working. Code which I have written:
var fText;
var location = "D:\a.txt";
var fso = new ActiveXObject("Scripting.FileSystemObject");
var tempFile = fso.OpenTextFile(location, 1);
while(tempFile.AtEndOfStream!=true) {
fText = tempFile.ReadLine();
}
The above code is working in IE but not working in other browsers.