if you can write something like jQuery using javascript it is easy to assume that javascript is better as you could create something better suited for your needs that could potentially be better than jQuery.

One more thing about jQuery.
If you working on network without internet connection or limited connectivity (for example for security reason) you better have all your jQuery libraries downloaded and hosted on your internal server.
It does not work if you running internal apps without internet connection!

Originally Posted by anna1

i think java is better than jquery

Wrong place to say this. We are not talking about Java at all here...
Here is a perfect example of someone who have no clue what is Java and what is JavaScript, but, I am pretty sure, can play with jQuery...

Both asp.net ajax and jQuery are javascript base.Personally I like jQuery...JQuery is just a JavaScript library. It can do most things that you would do "by hand" in JavaScript, but not all. I honestly don't see how you could effectively use JQuery without knowing JavaScript.