+
+function beginend(days) {
+ var now = Date.now();
+ var end = new Date(now).toISOString().substr(0, 19); // 2018-06-13T16:52:30.995Z
+ var begin = new Date(now - days * 60*60*24 * 1000).toISOString().substr(0, 19);
+ return '&begin=' + begin + '&end=' + end;
+}
+
+dayschart('#chart1', 'Tag', 1);
+dayschart('#chart7', 'Woche', 7);
+dayschart('#chart31', 'Monat', 31);
+dayschart('#chart365', 'Jahr', 365);