fixes #2496 - thanks thoti!

* some refactoring of thoti's patch for minification
* implement fallback chain for browser support of page visibility API
* update jslint, unit tests, and docs


git-svn-id: http://dev.piwik.org/svn/trunk@5401 59fd770c-687e-43c8-a1e3-f5a4ff64c105

1 files changed, 12 insertions, 12 deletions

diff --git a/piwik.js b/piwik.js
index f3919dbaa8..3b4cb44015 100644
--- a/piwik.js
+++ b/piwik.js
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