basic support for multiple charts

html/force.css

@@ -27,16 +27,24 @@ line.link {
   fill: #FFF0B3;
 }
 
-#nodeinfo {
+#nodeinfo, #controlpanel {
   position: absolute;
-  top: 10px;
-  left: 10px;
   background: #fff;
   border: 1px solid #ddd;
   padding: 0.5em;
   font-family: arial, helvatica;
 }
 
+#nodeinfo {
+  top: 10px;
+  left: 10px;
+}
+
+#controlpanel {
+  top: 10px;
+  right: 10px;
+}
+
 #nodeinfo h1, p {
   color: #555;
 }
@@ -50,3 +58,70 @@ line.link {
   font-size: 10pt;
   margin: 0;
 }
+
+.btn {
+    color: #6e6e6e;
+    font: bold 12px Helvetica, Arial, sans-serif;
+    text-decoration: none;
+    padding: 7px 12px;
+    position: relative;
+    display: inline-block;
+    text-shadow: 0 1px 0 #fff;
+    -webkit-transition: border-color .218s;
+    -moz-transition: border .218s;
+    -o-transition: border-color .218s;
+    transition: border-color .218s;
+    background: #f3f3f3;
+    background: -webkit-gradient(linear,0% 40%,0% 70%,from(#F5F5F5),to(#F1F1F1));
+    background: -moz-linear-gradient(linear,0% 40%,0% 70%,from(#F5F5F5),to(#F1F1F1));
+    border: solid 1px #dcdcdc;
+    border-radius: 2px;
+    -webkit-border-radius: 2px;
+    -moz-border-radius: 2px;
+    margin-right: 10px;
+}
+
+.btn:hover {
+    color: #333;
+    border-color: #999;
+    -moz-box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2) -webkit-box-shadow:0 2px 5px rgba(0, 0, 0, 0.2);
+    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
+}
+
+.btn:active {
+    color: #000;
+    border-color: #444;
+}
+
+.btn.left {
+    -webkit-border-top-right-radius: 0;
+    -moz-border-radius-topright: 0;
+    border-top-right-radius: 0;
+    -webkit-border-bottom-right-radius: 0;
+    -moz-border-radius-bottomright: 0;
+    border-bottom-right-radius: 0;
+    margin: 0;
+}
+
+.btn.middle {
+    border-left: solid 1px #f3f3f3;
+    margin: 0;
+    border-left: solid 1px rgba(255, 255, 255, 0);
+}
+
+.btn.right {
+    -webkit-border-top-left-radius: 0;
+    -moz-border-radius-topleft: 0;
+    border-top-left-radius: 0;
+    -webkit-border-bottom-left-radius: 0;
+    -moz-border-radius-bottomleft: 0;
+    border-bottom-left-radius: 0;
+    border-left: solid 1px #f3f3f3;
+    border-left: solid 1px rgba(255, 255, 255, 0);
+}
+
+.btn.active {
+    background: #C83771;
+    color: #fff;
+  text-shadow: none;
+}