GUI -- Added sample view to demonstrate radio buttons.
diff --git a/web/gui/src/main/webapp/sampleRadio.js b/web/gui/src/main/webapp/sampleRadio.js
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+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ Sample view to illustrate radio buttons.
+
+ @author Simon Hunt
+ */
+
+(function (onos) {
+    'use strict';
+
+    var data = [ 'Yo, radio button set...', 'Time to shine' ],
+        btnSet = [
+            { id: 'b1', text: 'First Button' },
+            { id: 'b2', text: 'Second Button' },
+            { id: 'b3', text: 'Third Button' }
+        ],
+        btnLookup = {};
+
+    btnSet.forEach(function (b) {
+        btnLookup[b.id] = b;
+    });
+
+    // invoked when the view is loaded
+    function load(view, ctx) {
+        view.setRadio(btnSet, doRadio);
+
+        view.$div.selectAll('p')
+            .data(data)
+            .enter()
+            .append('p')
+            .text(function (d) { return d; })
+            .style('padding', '2px 8px');
+    }
+
+    function doRadio(view, id) {
+        view.$div.append('p')
+            .text('You pressed the ' + btnLookup[id].text)
+            .style({
+                'font-size': '10pt',
+                color: 'green',
+                padding: '0 20px',
+                margin: '2px'
+            });
+    }
+
+    // == register the view here, with links to lifecycle callbacks
+
+    onos.ui.addView('sampleRadio', {
+        reset: true,    // empty the div on reset
+        load: load
+    });
+
+}(ONOS));