Ajax Login & Registration Form

Hi all, I have a site and I want to implement an ajax login/register form so the user can login/register in a popup and not have to leave the page. I have already created the form and need someone to create the javascript/ajax/php/mysql work to register or login the user. For registration: The user will enter their name, email, password, confirm password. This info should be validated with ajax (valid email, passwords match, see if email is already registered) and if everything is good, insert into mysql database and store cookie on computer so user stays logged in. For login: User will enter email/password. If user exists in database, create PHP session variable that says they are logged in. If user checks "keep me logged in", store cookie on computer. This should be a quick easy and cheap job for an experience programmer. Thanks!