use Rails 4 turbolinks

app/views/pages/export.html.erb

@@ -15,7 +15,7 @@
     return Date.UTC(d.substring(0,4), d.substring(5,7)-1, d.substring(8,10), d.substring(11,13), d.substring(14,16), d.substring(17,19)) - (myOffset * 60000);
   }
 
-  $(document).ready(function() {
+  $(document).on('page:load ready', function() {
     // blank array for holding chart data
     var chartData = [];
     // variable for the date string