ok..how do you put the sign up link to let people sign up for your page and then how do you put the username and password boxes on there so they can sign in..?

you'll have t oget into php i'm pretty sure. but you make the text boxes and have them target the php and the php will create a database with the names and password.

i think....

Xir is right. You will need to use some sort or server side language and cookies.
Plus, I you don't want to make a database, just use .htaccess and .htpasswd.