Open Facebook popup using AS
The first step to open a facebook dialog popup using ActionScript 3.0 is to create a bridge between our swf and fbjs’ (facebook javascript) page.
In order to open a popup, facebook introdouced a fbml tag that must be inserted in the application callback page. As described in the Wiki, it’s important to put the fbjs tag:
<fb:fbjs-bridge/>
before the swf’s inclusion tag
<fb:swf swfsrc="URL_SWF" width="SWF_WIDTH" height="SWF_HEIGHT"/>
and it must be followed by the script tag
<script>
<!--
-->
</script>
<!--
-->
</script>