Creating Client-Side Updateable News Page

Howdy folks,
I’m developing a website for a group that is in need of a news page. On this single page they want to add and edit news posts. The site thusfar is comprised of css, a DHTML menu, and html pages.

Here’s my problem. I’ve found a few ways to do it with databases, but I don’t have server resource for one. I need to accomplish this without the additional aid of a dB, server stress, or outside sources.

Ideally I’m looking for a JavaScript method that will allow me to present something similar to this: www dot effectiveweb.com/editnew.html

Thanks so much guys, you are my heroes!