Javascript insert to HTML

when HTTP_REQUEST {
     Disable the stream filter for all requests
    STREAM::disable
    
     LTM does not decompress response content, so if the server has compression enabled
     and it cannot be disabled on the server, we can prevent the server from sending
     a compressed response by removing the compression offerings from the client
    HTTP::header remove "Accept-Encoding"
} 
when HTTP_RESPONSE {
     Check if response type is text
    if { [HTTP::header value Content-Type] contains "text" } {

         Define the stream replacement
        STREAM::expression {@@@}

         Enable the stream filter for this response only
        STREAM::enable
    }
}