jQuery makes dynamic web sites via JavaScript much easier for non-javascripters, esp.
including designers.

Here are a couple introductory videos to _show_ you what I am talking about:

http://css-tricks.com/videos/css-tricks-video-20.php

http://css-tricks.com/videos/css-tricks-video-35.php

Also here's a link so you can check out more about what jQuery is:
http://www.slideshare.net/SteveKrueger/designers-guide-to-jquery

And, here is a sample of jQuery at work (to go with the
above materials): :

http://css-tricks.com/examples/Intro-to-jQuery-2.zip

After you unzip the Intro-to-jQuery-2.zip ,
run the index.html file (be sure to click the buttons more than once).
View the easy code.

More Great Links: jQuery for Designers
jQuery For Designers http://docs.jquery.com/Tutorials:jQuery_For_Designers

-- An introduction of jQuery to web designers with how tos on doing simple things.

http://jqueryfordesigners.com/ --
A blog, dedicated to showing designers "how easy it is to apply web interaction with jQuery".

http://www.webdesignerwall.com/tutorials/jquery-tutorials-for-designers/ -- jQuery Tutorials for Designers
10 basic visual tutorials for jQuery.

http://tutorialblog.org/8-fantastic-jquery-tutorials-for-designers/  -- Fantastic jQuery Tutorials for Designers
8 more tutorials for achieving visual bliss with jQuery.

Regards, lorlarz