Possible Duplicate:
How does Facebook Sharer select Images?
We are using Facebook's sharer.php service to share pages on our site. Right now this works great, but we are now having difficult trying to find out how to offer users more than one thumbnail to pick from (the sharer.php page offers a UI for multiple images, so it must be possible somehow).
We have this meta tag currently:
<meta property="og:image" content="http://www.mysite.com/myimage.jpg" />
We couldn't find anything suggesting how to do this. Does anybody have any ideas?