First off we will be to sort of “install” jQuery on your page, don’t panic its simple. Make sure you download the latest build jQuery by clicking here. Once you have the file jquery-latest.js in the same folder as your html files, or in a separate folder for scripts, your gonna need the code to put it on your site, here it is.
You need to put that code in the head of your site(in between <head> and </head>)
The code above does one obvious thing, it shows a DIV tag that has the class “hidden”. Yes it is that easy.
Below is a diagram I made up to show off a simple jQuery string and where everything is placed for it to work.