<div id="fb-root">
</div>
<script src="http://connect.facebook.net/en_US/all.js"></script>
<p>
<input type="button"
        onclick="sendRequestToRecipients(); return false;"
        value="Send Request to Users Directly"
      />
<input type="text" value="User ID" name="user_ids" />
</p>
<p>
<input type="button"
      onclick="sendRequestViaMultiFriendSelector(); return false;"
      value="Send Request to Many Users with MFS"
    />
</p>

<script>
      FB.init({
        appId  : '355342334501830',
        frictionlessRequests: true,
      });

      function sendRequestToRecipients() {
        var user_ids = document.getElementsByName("user_ids")[0].value;
        FB.ui({method: 'apprequests',
          message: 'My Great Request',
          to: user_ids,
        }, requestCallback);
      }

      function sendRequestViaMultiFriendSelector() {
        FB.ui({method: 'apprequests',
          message: 'My Great Request'
        }, requestCallback);
      }
     
      function requestCallback(response) {
        // Handle callback here
      }
    </script>