How to create subfolder in favorites folder?

[usenetreader]

Hi friends,

I want to create a new folder in browsers favorites folder. Now, I am using "window.external.AddFavorite" command and this line works well. But newly created bookmarks are going to root of the favorites folder.

But, I want this bookmarks to be created in : favoritesRoot/myfolder/bookmarkname

So, how can I add subfolder(s) to IE/Firefox favorites folder?

Thank you...