JavaScript list of Files in Folder

var folderspec="C:\\msa"
var fso, f, f1, fc, s;
fso = new ActiveXObject("Scripting.FileSystemObject");
f = fso.GetFolder(folderspec);
fc = new Enumerator(f.files);
s = "";
for (; !fc.atEnd(); fc.moveNext())
{
s += fc.item();
s += "
";

}
document.write(s);