Description:
jquery is library written in javascript to ease your javascript code. jQuery greatly simplifies JavaScript programming along with easy-to-use API that works across a multitude of browsers which saves time which you would spend on bunch of complicated codes of javascript, like ajax calls,dom manipulation,each loops,etc. The jQuery syntax is tailor-made for selecting HTML elements and performing some action on the element(s).
http://www.havsolutions.com/jquery-for-beginners/