Among the issues that the increasing ubiquity of Ajax on the web brings up is, where does that leave the "Back" button. Or, is the page metaphor still relevant, and if not, how soon before everyone knows it?
Essentially all worthwhile new technologies ask us to change our understanding of the domain they effect, and the compilation of techniques together known as Ajax have the potential to do just that. But it will take time, no doubt. There’s still a lot of work to be done–both for developers and designers–before adoption becomes universal, and years more before the inevitable breakdown of the page metaphor. On the way, questions will need to be asked about where we as web app developers see our role in the transformation to "Web 2.0".
hi, i found a full ajax website, and the back button works : http://itbreaks.net