jQuery framework sure makes it easier to create scripts, but PLEASE, don't overdo it! It's amazing that everyone now adds jQuery sometimes just for a simple $("#id") call - JS already supports getElementById('id') folks, no need to load a framework for that!
And then animations and useless or shortly timed ajax/DOM calls, making a simple site to fire up to over 200Mb of RAM per page, if not crashing the browser, as a late crappy "snowflakes" animation does.
Bottom line, it's OK to use JS, but not OK to abuse it! When you concept a website keep in mind your visitors' hardware and if your site really should require an i7 CPU and 1 Tb of RAM to visit.
