set HTTPOnly in cookie

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_RESPONSE {
   set ck [HTTP::header values "Set-Cookie"]
   HTTP::header remove "Set-Cookie"

   foreach acookie $ck {
      if {$acookie starts_with "BBB"} {
         HTTP::header insert "Set-Cookie" "${acookie}; HttpOnly"
      } else {
         HTTP::header insert "Set-Cookie" "$acookie"
      }
   }
}
}

 response from server

[root@ve10:Active] config  curl -I http://200.200.200.101
HTTP/1.1 200 OK
Date: Wed, 22 Aug 2012 08:04:21 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 11 Nov 2011 14:48:14 GMT
ETag: "4183e4-3e-9c564780"
Accept-Ranges: bytes
Content-Length: 62
Set-Cookie: AAA=1111; path=/
Set-Cookie: BBB=2222; path=/
Set-Cookie: CCC=1234; path=/
Content-Type: text/html; charset=UTF-8

 via bigip

[root@ve10:Active] config  curl -I http://172.28.19.79
HTTP/1.1 200 OK
Date: Wed, 22 Aug 2012 08:04:28 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 11 Nov 2011 14:48:14 GMT
ETag: "4183e4-3e-9c564780"
Accept-Ranges: bytes
Content-Length: 62
Content-Type: text/html; charset=UTF-8
Set-Cookie: AAA=1111; path=/
Set-Cookie: BBB=2222; path=/; HttpOnly
Set-Cookie: CCC=1234; path=/