--- trunk/tntnet/dynamic/temperaturegraph.ecpp	2007/12/06 14:12:31	176
+++ trunk/tntnet/dynamic/temperaturegraph.ecpp	2007/12/06 14:12:36	177
@@ -17,6 +17,8 @@
 int id;
 </%args>
 <{
+reply.setHeader("Cache-Control", "no-cache, must-revalidate"); // Http/1.1
+reply.setHeader("Expires",  "Mon, 26 Jul 1997 05:00:00 GMT"); //date in the past
 
 GD::Image image;
 image.CreateTrueColor( GD::Size(600,360));