JQuery, the very very basics - Lesson 1

JQuery is the star among the growing list of JavaScript libraries. A few of its characteristics are light-weight, cross-browser compatibility and simplicity. A task that would take 10 lines of code with traditional JavaScript can be accomplished with JQuery in just 1 line of code. I write to record the series of very basic lessons I learned about JQuery (my study source is the very readable book JQuery in Action).