diff -r 058bb3dc685f -r 0b59724cb3f2 cubicweb/web/data/cubicweb.log.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/web/data/cubicweb.log.js	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,13 @@
+// This contains template-specific javascript
+
+function filterLog(domid, thresholdLevel) {
+    var logLevels = ["Debug", "Info", "Warning", "Error", "Fatal"]
+    var action = "hide";
+    for (var idx = 0; idx < logLevels.length; idx++){
+        var level = logLevels[idx];
+        if (level === thresholdLevel){
+            action = "show";
+        }
+        $('#'+domid+' .log' + level)[action]();
+    }
+}