http://code.google.com/chrome/whitepapers/prerender.html
Prefetching is a feature that is currently implemented in Firefox. Prerendering is an experimental feature in Chrome (versions 13 and up) that can take hints from a site’s author to speed up the browsing experience of users. A site author includes an element in HTML that instructs Chrome to fetch and render an additional page in advance of the user actually clicking on it.
The concept of prefetching is included in the HTML5 spec.
test :
http://prerender-test.appspot.com/
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