<p>I really don't know how to describe it, but if you understood it and had experience on that field, may be you can help me with something 'Open Source' and 'Ready-made'.</p>

<p>I want to create something like a box 'or widget', where you can change its content by hitting some buttons on the top of the box. (Hey the box is on a web page and this should use Ajax and Javascript).</p>

<p>I have tried some ready scritps, but I found them limited and they drive me crazy, JS frameworks also don't seems to offer such solution.
Any body have any idea on that field?</p>

Have you tried Jquery?
Visit www.jquery.com
Some example can be found at
http://www.openjs.com/scripts/events/keyboard_shortcuts/
Also please check the In-place editing example at
http://www.appelsiini.net/projects/jeditable
http://docs.jquery.com/Tutorials:Edit_in_Place_with_Ajax