Will content loaded by AJAX affect SEO/Search Engines?

Question

i wonder if content loaded dynamically by AJAX affect SEO/ability for search engines to index the page?

i am thinking of doing a constantly loading page, something l

Answer 1

The accepted answer on this question is no longer accurate. Since this post still shows in search results, I'll summarize the latest facts:

Sometime in 2009, Google released their AJAX crawling proposal. Other search engines added support for this scheme shortly thereafter. As of today, October 14, 2015, Google has deprecated their AJAX crawling scheme:

In 2009, we made a proposal to make AJAX pages crawlable. Back then, our systems were not able to render and understand pages that use JavaScript to present content to users. ... Times have changed. Today, as long as you're not blocking Googlebot from crawling your JavaScript or CSS files, we are generally able to render and understand your web pages like modern browsers.