fix switch color update logic bug
diff --git a/web/ons-demo/js/debug.js b/web/ons-demo/js/debug.js
index 7b66912..3d3b302 100644
--- a/web/ons-demo/js/debug.js
+++ b/web/ons-demo/js/debug.js
@@ -9,4 +9,23 @@
 		}
 	});
 	return links;
+}
+
+function debug_findswitch(model, dpid) {
+	var sw;
+
+	model.edgeSwitches.forEach(function (s) {
+		if (s.dpid == dpid)
+			sw = s;
+	});
+	model.aggregationSwitches.forEach(function (s) {
+		if (s.dpid == dpid)
+			sw = s;
+	});
+	model.coreSwitches.forEach(function (s) {
+		if (s.dpid == dpid)
+			sw = s;
+	});
+
+	return sw;
 }
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