I can not get the JQuery library to work

I am reading the book JQuery Novice To Ninja. I can upload the examples to mozzilla and they work but I down loaded the library to my folder and I wrote out the examples myself and put them in the same folder so I can get the practice and they will not work the code is exactly the same as the book I do not understand. All help greatly appreciated. Thanks:eye:

The code and most likely directory structure will be needed starting from the site root. its either invalid JavaScript or not linking to JQuery properly, could be both.