From Facebook Developer Wiki

does this work? i can't make it work on IE 7 or Google chrome

We don't support Chrome. You can see the browsers we support for Facebook Connect at JavaScript_Client_Library#Supported_Browsers. As for IE7, we're investigating. It's supposed to work. Thanks, Pete (563683308 17:15, 26 February 2009 (PST))

How does the "action" attribute work? What page should it point to? It's shown in the example but not listed in the attributes list.