241444 need login form for users

I need a custom login form create for my members. Each member on my website has a header and footer file they select to go over their software on my site. I need a custom login script that can be store on another person server, while still allowing users to sign in directly to my website. The script will use the client header and footer they select. The login form will have a username and password text box that connects with my site. Need to also look professional, not plain.