Redirect iRule

I want to redirect traffic if connection to a virtual server returns a error code 404, 408 500. How do i phrase the iRule?

Thanks.

when HTTP_RESPONSE {
  if { [HTTP::status] == "404" || [HTTP::status] == "408" || [HTTP::status] == "500" } {
    HTTP::redirect "http://www.siterequest.com/"
  }
}