Here is a link to a very simple script:
http://www.planet-source-code.com/vb/scripts/ShowCode.asp?lngWId=4&txtCodeId=6427This is a VERY simple use of VBScript and anyone looking at the source will find the password and login info, but without going to a dynamic (ASP/JSP/CGI) type web page you really don't have many other options.
I suppose you could write some sort of algorithm in the VBScript but that would be a whole lot of work.