Which is the easiest javascript framework/library to learn and develop DHTML, DOM and AJAX applications with codeigniter

[eluser]Beren[/eluser]
I would second the mootools recommendation, I used to use JQuery (which is excellent) because I think it is easier to get started with, but set aside a little time to learn javascript properly and mootools is (in my humble opinion) the best of the bunch. As Sarre said above, you might be expected to do a little more learning with mootools but it really pays off. If you're looking for a general introduction to *proper* javascript (as opposed to the crap that 99% books, sites etc teach) I would *strongly* recommend the following page (whether you go mootools or not): -

http://blog.mootools.net/2007/6/5/help-i...javascript

Especially check out the Douglas Crockford (Yahoo's Chief Javascript Guru) Videos, they may take some time to work through but put aside an afternoon or two and you'll be a MUCH better javascript programmer for it.
The introduction videos can be found via the article above, or from Yahoo video:-

http://video.yahoo.com/video/search?p=do...ge&x=0&y=0

Watch those vids whatever framework you choose because the more you understand the fundamentals of JS the more you'll be able to leverage from the framework you do eventually choose. Also, they help you unlearn a LOT of BAD javascript programming practices we have ALL picked-up over the years.

For more Douglas Crockford stuff check out his homepage at http://www.crockford.com/javascript/

Hope it helps, and good luck with your javascripting!