some time ago I learned jQuery by jQuery in action book, and I used a lot the examples included in the book using Firefox.
Now I have tried to run again that examples (principally lab.operation.html - chapter 2) but they don't work anymore and I have to access to them using a webserver.
In the example page, they don't show the "DOM Sample" and "DOM Sample Code", they are simply empty.
In the source code I see there is an ajax request but I 'm pretty sure that before I didn't use a webserver.
At the beginning I thought it was a problem about the browser (maybe some update changed something) but also with other browsers (Chrome, IE, Opera) I have the same issue.
I know you are not sorcerer, but do you have some kind of idea why now they don't call the ajax request?