I am using facebook to post into the facebook site using postToFeed().

Code:
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="https://www.facebook.com/2008/fbml"> <head> <title>My Feed Dialog Page</title> </head> <body> <div id='fb-root'></div> <script src='http://connect.facebook.net/en_US/all.js'></script> <p><a onclick='postToFeed(); return false;'>Post to Feed</a></p> <p id='msg'></p> <script> FB.init({appId: "OURAPPID", status: true, cookie: true, frictionlessRequests: true}); function postToFeed() { // calling the API ... var obj = { method: 'feed', link: 'http://www.ourdoamin.com/test.jsp', picture: 'http://www.ourdoamin.com/image.jpg', name: 'Test Article', caption: 'Here We GO', description: 'This is a test.' }; function callback(response) { document.getElementById('msg').innerHTML = "Post ID: " + response['post_id']; } FB.ui(obj, callback); } </script>
How do I retrieve the email address of the person sharing the post? Its urgent..