adan wrote:that script is simple... it's great... but how to use for multiple user, and can we use external .txt to store the username and password?
The script as it stands only has one hard coded username and password per page. So, no, as it is, it will not differentiate between user "A" and user "B" and user "C" (if that is what you meant by multiple user).
However, if you want different users to have different usernames and passwords, then your second idea, to store the paired values into a .txt file would work just fine without too much additional work...