--- a/integration/js/streamgraph.js	Tue Jan 29 13:29:21 2013 +0100
+++ b/integration/js/streamgraph.js	Fri Apr 12 15:37:38 2013 +0200
@@ -169,6 +169,7 @@
         }).mouseout(function() {
             $("body").trigger("unselect-cluster", line.id);
         });
+        $(line.mousesurface.node).attr("data-cluster-id", line.id).parent().attr("data-cluster-id", line.id);
     });
     
     $("body").on("unselect-cluster", function(e, clusterid) {