function request_friend( mingle_url, user_id, friend_id )
{
  jQuery.ajax( {
    type: "POST",
    url: mingle_url,
    data: "controller=friends&action=friend_request&user_id=" + user_id + "&friend_id=" + friend_id,
    success: function(html) {
      jQuery(".friend_request_button-" + friend_id ).replaceWith( "✓ Friendship Requested" );
    }
  });
}