Javascript Append to Text File

Question

I have several JavaScript files that when run return no errors, but do not do what is coded inside them. This is one of them. Is there something else I should have installed or enabled on the PC running the .JS files?

function WriteDemo()
{
 var fso, f, r;
 var ForReading = 1, ForWriting = 2;
 fso = CreateObject("Scripting.FileSystemObject");
 f = fso.OpenTextFile("c:\\testfile.txt", ForWriting, true);
 f.Write("Hello world!");
 f.Close();
 f = fso.OpenTextFile("c:\\testfile.txt", ForReading);
 r = f.ReadLine();
 return(r);
}

• Kroltan: That's JScript, not Javascript.
• Pointy: That file by itself won't do anything; the function is declared but never invoked.
• The Archetypal Paul: 'but do not do what is coded inside them'. What does it do instead?
• vol7ron: You should consider not doing this

Answer 1

According to the MSDN article on FileSystemObject, for JavaScript you should use

new ActiveXObject

instead of

CreateObject

(that's for VB).

function WriteDemo() 
{
 var fso, f, r;
 var ForReading = 1, ForWriting = 2;
 fso = new ActiveXObject("Scripting.FileSystemObject");
 f = fso.OpenTextFile("c:\\testfile.txt", ForWriting, true);
 f.Write("Hello world!");
 f.Close();
 f = fso.OpenTextFile("c:\\testfile.txt", ForReading);
 r = f.ReadLine();
 return(r);
}

And, of course, don't forget to call the function. :)

WriteDemo();

• Shootace: Ok, makes sense. I am used to VBScript. I thought the ActiveXObject was for calling something in IE. Thank you Brian!
• Brian McBrayer: No problem. If this helped, you can mark it as the correct answer. Thanks! :)