object.SubFolders 

function ShowFolderList(folderspec)
{
   var fso, f, fc, s;
   fso = new ActiveXObject("Scripting.FileSystemObject");
   f = fso.GetFolder(folderspec);
   fc = new Enumerator(f.SubFolders);
   s = "";
   for (;!fc.atEnd(); fc.moveNext())
      {
         s += fc.item();
         s += "<br>";
      }
      return(s);
}

Function ShowFolderList(folderspec)
   Dim fso, f, f1, s, sf
   Set fso = CreateObject("Scripting.FileSystemObject")
   Set f = fso.GetFolder(folderspec)
   Set sf = f.SubFolders
   For Each f1 in sf
      s = s & f1.name 
      s = s & "<BR>"
   Next
   ShowFolderList = s
End Function