Is there an easy way to add a secure file upload form (username, password, select file) to a website?

I am very new to website design. Have an architect who wants his clients to enable his clients to upload (ftp - but don't know if http could be a better alternative?) files (plans etc.) to him, through the website I'm designing for him.

I have seen similar things available on printers websites...

I have seen uploadify, but it requires flash (I can only code HTML, CSS and a tiny bit of PHP), and don't think it is a secure option. I have also seen net2ftp, but don't really understand how it works.

Any direction would be sincerely appreci开发者_如何学Goated.

Would WEBDAV fit the bill at all?