In
this Webmaster Central Blog post, Google offers Q&A-style advice for site owners who use JavaScript and AJAX, but still want to make their site crawlable. The tips include embedding real links within
the AJAX coding, and making sure that the site also works for browsers that don't have JavaScript turned on (like the ones on mobile devices).
While the search giant is working to understand how these design tools impact the perceived relevance and quality of on-page content, the algorithm is still not great at processing that info well, so Google recommends backing up Java and AJAX with hard HTML links and code at every instance.