jQuery is a coding language that is a branch from JavaScript. jQuery works like JavaScript where its used to help with interaction and effects with your development code. jQuery hasn’t been around very long, it was release in January 2006 and only on version 1.4.0. jQuery is a new and exciting technology that is catching on quickly and making the internet more interactive and enjoyable
Read about JQuery in detail:
http://www.mindstick.com/Beginner/ContentPage.aspx?cdata=JQuery