Facebook Share Button original code:
<a name=”fb_share” type=”icon_link” href=”http://www.facebook.com/sharer.php”>Share</a>
To set url and page title to that of frameset add this after above code:
document.getElementsByName(‘fb_share’).setAttribute(‘href’, ‘http://www.facebook.com/sharer.php?u=’ + escape(parent.location.href) + ‘&t=’ + escape(parent.document.title));
One problem with directing Facebook direct to the frameset url is that it cannot find Content Summary and Image but I think this can be fixed by adding some meta tags as described in Facebooks documentation.