Hello im not sure if anyone has posted about this but if so please give me the link so i may be directed there.

I have a website, i have other people with email accounts but i want to be able to let them log into my site using their email account. i have no idea how to go about doing that. ive started off by creating an area that says Username and password (2 one with a linking login button and one without). i want my email users to be able to log in and access their mail directly from my site. please help me

You are on the right path but you are going to need some other things to go along with it. It gets a little in depth but on your server you are going to need a database, it will hold the user's login and passwords, and a server side technology. I personally would use PHP but there are plenty out there for you to choose from.

Here are some links with basic tutorials for logins using a database, and PHP. If you don't have a database i recommend MySQL since it is free to download from Sun's website.

Basic Tutorial Logins:
http://net.tutsplus.com/tutorials/php/a-better-login-system/
http://net.tutsplus.com/tutorials/php/user-membership-with-php/