diff --git a/plot_gen.py b/plot_gen.py
index 6720fba..99a5abb 100644
--- a/plot_gen.py
+++ b/plot_gen.py
@@ -1,5 +1,6 @@
 from datetime import datetime
 from datetime import timezone
+import numpy
 
 
 class TimeSeriesAccumulator:
@@ -26,19 +27,15 @@ class TimeSeriesAccumulator:
         result = []
         for i in self.data:
             new = f(i)
-            if new == numpy.nan:
+            if numpy.isnan(new):
                 result.append(prev)
             else:
                 result.append(new)
                 prev = new
         return result
 
-
-return [f(i) for i in self.data]
-
-
-def get_ts(self):
-    return [datetime.utcfromtimestamp(self.start_timestamp+(i+1)*self.bin_time) for i in range(self.n_bins)]
+    def get_ts(self):
+        return [datetime.utcfromtimestamp(self.start_timestamp+(i+1)*self.bin_time) for i in range(self.n_bins)]
 
 
 if __name__ == "__main__":
diff --git a/tabler/index.html b/tabler/index.html
index 240ef34..c5a593b 100644
--- a/tabler/index.html
+++ b/tabler/index.html
@@ -430,9 +430,9 @@
   <script src="./dist/js/tabler.min.js"></script>
 
   <script>
-    $.get("/stat", function (data) {
-      // @formatter:off
-      document.addEventListener("DOMContentLoaded", function () {
+var load_stat = function(){    
+$.getJSON("/stat", function (data) {
+	// @formatter:off
         window.ApexCharts && (new ApexCharts(document.getElementById('chart-mentions'), {
           chart: {
             type: "line",
@@ -516,9 +516,10 @@
             },
           },
         })).render();
-      });
       // @formatter:on
     });
+};
+load_stat();
   </script>
 
 
@@ -601,4 +602,4 @@
   </script>
 </body>
 
-</html>
\ No newline at end of file
+</html>