May 29, 08
Detect the Social Sites Your Visitors Use - SocialHistory.js, code enables you to detect which social bookmarking sites your visitors use. How does SocialHistory.js know? By using a cute information leak introduced by CSS. The browser colors visited links differently than non-visited links. All you have to do is load up a whole bunch of URLs for the most popular social bookmarking sites in an iframe and see which of those links are purple and which are blue.
Tag(s):
javascript,
ajax,
browser history
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