Change slowupdate() to update cost properly

Addresses emoncms#174 by branching on the viewmode, and applying the unit cost to the kWh

Author: cricalix

apps/OpenEnergyMonitor/myelectric/myelectric.php

@@ -510,7 +510,8 @@ function slowupdate()
 {
     var use = config.app.use.value;
     var use_kwh = config.app.use_kwh.value;
-    
+    var unitcost = config.app.unitcost.value;
+
     var interval = 86400;
     var now = new Date();
     var end = Math.floor(now.getTime() * 0.001);
@@ -524,10 +525,15 @@ function slowupdate()
     }
 
     if (usetoday_kwh!==null) {
-        if (usetoday_kwh<100) {
-            $("#usetoday").html((usetoday_kwh).toFixed(1));
+        if (viewmode == "energy") {
+            if (usetoday_kwh<100) {
+                $("#usetoday").html((usetoday_kwh).toFixed(1));
+            } else {
+                $("#usetoday").html((usetoday_kwh).toFixed(0));
+            }
         } else {
-            $("#usetoday").html((usetoday_kwh).toFixed(0));
+            var cost_today = usetoday_kwh*unitcost;
+            $("#usetoday").html((cost_today).toFixed(2));
         }
     } else {
         $("#usetoday").html("---");