Forumlar / Cotonti / Extensions / Quick Edit

Nobody says it is a bad idea. We like the idea but we say it is better if done as a plugin and it is more comfortable to use if it updates data with AJAX.

So you need to take a look on how the plugins are made and as for AJAX, there is nice documentation for it. You can always look at existing plugins like indexpolls and markitup to see how things are done.