diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/examples/button.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/examples/button.css	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,35 @@
+button {
+  font: 14px Helvetica Neue;
+  background-color: #222;
+  background-image: -moz-linear-gradient(top, rgba(255,255,255,.25), rgba(255,255,255,.11));
+  background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, rgba(255,255,255,.25)),color-stop(1, rgba(255,255,255,.11)));
+  background-image: -webkit-linear-gradient(rgba(255,255,255,.25), rgba(255,255,255,.11));
+  color: #fff;
+  text-rendering: optimizeLegibility;
+  text-shadow: 0 -1px 1px #222;
+  padding: 6px 10px 6px 10px;
+  border: 0;
+  border-radius: 0;
+  border-bottom: 1px solid #222;
+  margin: 0;
+  -moz-box-shadow: 0 1px 3px #999;
+  -webkit-box-shadow: 0 1px 3px #999;
+}
+
+button.first {
+  border-top-left-radius: 5px;
+  border-bottom-left-radius: 5px;
+}
+
+button.last {
+  border-top-right-radius: 5px;
+  border-bottom-right-radius: 5px;
+}
+
+button.active {
+  background-color: rgb(65,102,133);
+}
+
+button:hover {
+  background-color: steelblue;
+}