Need to set up user access for a website

[didiszw]

I need to build a password protected page for my website. There will be a number of users and users will need to choose their own passwords with their email address being the username (not a simple alphanumeric phrase).

The user access list needs to be maintained from different locations by different administrators with minimum computer skills. They can however be taught to use a simple program.

What is the best way to go about this?

[infinityspiral]

You should probably break this huge question down and repost it as a few questions.
1) how do i build a password protected page
2) how do i salt a password
3) how do i submit data to a database using an html form
4) how do i create multilevel admins for a page or how do i create security restrictions based on user groups

I'd start with google on each one of those first to give you a jump start