Easy update for web page interface

I am desperately in need of a solution for a client. I'm creating a web page that requires a way for the client to easily update the content themselves, without having to deal with any HTML, ASP or other coding. Maybe something with a clean interface where they can insert the text and click a button to update everything. something like an administrators page that is really easy to use. Any ideas? It seems like there's gotta be a solution out there, Im just stumped right now. help!

The text box that I'm typing into right now is pretty much ideal for what you need. But you'll also need more than just that. Google for CMS (content management system) or look for a portal like MadDog's. They are pretty simple to use and offer most of what you'd need.