diff --git a/html/force.css b/html/force.css
index 435e8da..32d8ddb 100644
--- a/html/force.css
+++ b/html/force.css
@@ -21,3 +21,7 @@ line.link {
 #chart {
   background-image: url(gplaypattern.png);
 }
+
+.node.highlight ellipse {
+  fill: #FFF0B3;
+}
diff --git a/html/force.js b/html/force.js
index d1815ba..e2e4587 100644
--- a/html/force.js
+++ b/html/force.js
@@ -67,7 +67,14 @@ d3.json("nodes.json", function(json) {
    function fade(opacity) {
             return function(d) {
                   node.style("stroke-opacity", function(o) {
-                        thisOpacity = isConnected(d, o) ? 1 : opacity;
+                        var connected = isConnected(d, o);
+
+                        if (connected && opacity != 1)
+                          d3.select(this).classed("highlight", true);
+                        else
+                          d3.select(this).classed("highlight", false);
+
+                        thisOpacity = connected ? 1 : opacity;
                         this.setAttribute('fill-opacity', thisOpacity);
                         return thisOpacity;
                     });