how does it work in ajax?

[eluser]Unknown[/eluser]
i have done three links , we will click that links it will fetch some text from some other page.
when we click that link its how 404 page not found and .

please help me
thanking you

[eluser]n0xie[/eluser]
...

[eluser]ascotan[/eluser]
Don't click the second link.