Ack...you would be after a JS pass word protection script, which to be frank sucks. It is very insecure and you can not run a member facility. If you want to get serious about this, then you could quite easily whip up an Access DB, then a coupla neat little scripts using ASP - VBS/JS and SQL.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.