Progressed on generalizing functions.

js/tracking.js

@@ -0,0 +1,10 @@
+var idSite = 1;
+var piwikTrackingApiUrl = 'https://museum-digital.jrenslin.de/piwik/piwik.php';
+
+var _paq = _paq || [];
+_paq.push(['setDocumentTitle', document.domain + "/" + document.title]);
+_paq.push(['setTrackerUrl', piwikTrackingApiUrl]);
+_paq.push(['setSiteId', idSite]);
+_paq.push(['disableCookies']);
+_paq.push(['trackPageView']);
+_paq.push(['enableLinkTracking']);