Add to Favorites Toolbar Button

I am trying to add a toolbar button (for webhelp output) for a client to use that will add the current page to the user's IE Favorites list. I have used the script from Rick Stone's Skinny On Skins "Toolbar button to add items to the Favorites list" topic, but I get a javascript error when trying to execute the button in the toolbar.

Here is the code I'm copying from Rick's Skinny on Skins ...

javascript:window.external.AddFavorite(parent.frames[1].bsscright.location,paren t.frames[1].bsscright.document.title);

Any help would be welcomed!