insert javascript to html pages using irules

when HTTP_REQUEST {
    Disable stream filter by default
   STREAM::disable
    Don't allow response data to be chunked
   if { [HTTP::version] eq "1.1" } {
       Force downgrade to HTTP 1.0, but still allow keep-alive connections.
       Since HTTP 1.1 is keep-alive by default, and 1.0 isn't,
       we need make sure the headers reflect the keep-alive status. 
      if { [HTTP::header is_keepalive] } {
        HTTP::header replace "Connection" "Keep-Alive"
      }
   }
}
when HTTP_RESPONSE {
   if {[HTTP::header Content-Type] starts_with "text/"} {
       Remove the spaces before and after head in < head >
      STREAM::expression {@< head >@@}
      STREAM::enable
   }
}
when STREAM_MATCHED {
    Once we've hit one match, disable the stream filter for the rest of the response
   STREAM::disable
}
Aaron