Arrow in nav menus in CSS/JS (e.g. playframework.org)

Posted by manmal on Stack Overflow See other posts from Stack Overflow or by manmal
Published on 2011-03-12T16:04:06Z Indexed on 2011/03/12 16:10 UTC
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JavaScript

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html

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css

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design

The navigation menu at the top of the www.playframework.org site features a small arrow pointing upward for the currently selected section (Home, Learn, Download,...). I tried to get behind the implementation they used, but I can't wrap my head around it - the resource does not show up in Chrome's Resources window, and an inspection of the elements did not show any signs of a background image, nor a JS interceptor (although I might have missed that). What in hellhound's name is going on there? :)

Screenshot

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