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+<!doctype html>
+<html>
+<head>
+    <title>Network | Hierarchical layout</title>
+
+    <style type="text/css">
+        body {
+            font: 10pt sans;
+        }
+
+        #mynetwork {
+            width: 600px;
+            height: 600px;
+            border: 1px solid lightgray;
+        }
+    </style>
+
+    <script type="text/javascript" src="../exampleUtil.js"></script>
+    <script type="text/javascript" src="../../../dist/vis.js"></script>
+    <link href="../../../dist/vis.css" rel="stylesheet" type="text/css"/>
+
+
+    <script type="text/javascript">
+        var nodes = null;
+        var edges = null;
+        var network = null;
+
+        function destroy() {
+            if (network !== null) {
+                network.destroy();
+                network = null;
+            }
+        }
+
+        function draw() {
+            destroy();
+            // randomly create some nodes and edges
+            var nodeCount = document.getElementById('nodeCount').value;
+            var data = getScaleFreeNetwork(nodeCount)
+
+            // create a network
+            var container = document.getElementById('mynetwork');
+            var directionInput = document.getElementById("direction").value;
+            var options = {
+                layout: {
+                    hierarchical: {
+                        direction: directionInput
+                    }
+                }
+            };
+            network = new vis.Network(container, data, options);
+
+            // add event listeners
+            network.on('select', function (params) {
+                document.getElementById('selection').innerHTML = 'Selection: ' + params.nodes;
+            });
+        }
+
+    </script>
+    <script src="../../googleAnalytics.js"></script>
+</head>
+
+<body onload="draw();">
+<h2>Hierarchical Layout - Scale-Free-Network</h2>
+
+<div style="width:700px; font-size:14px; text-align: justify;">
+    This example shows the randomly generated <b>scale-free-network</b> set of nodes and connected edges from example 2.
+    In this example, hierarchical layout has been enabled and the vertical levels are determined automatically.
+</div>
+<br/>
+
+<form onsubmit="draw(); return false;">
+    <label for="nodeCount">Number of nodes:</label>
+    <input id="nodeCount" type="text" value="25" style="width: 50px;">
+    <input type="submit" value="Go">
+</form>
+<p>
+    <input type="button" id="btn-UD" value="Up-Down">
+    <input type="button" id="btn-DU" value="Down-Up">
+    <input type="button" id="btn-LR" value="Left-Right">
+    <input type="button" id="btn-RL" value="Right-Left">
+    <input type="hidden" id='direction' value="UD">
+</p>
+
+<script language="javascript">
+    var directionInput = document.getElementById("direction");
+    var btnUD = document.getElementById("btn-UD");
+    btnUD.onclick = function () {
+        directionInput.value = "UD";
+        draw();
+    }
+    var btnDU = document.getElementById("btn-DU");
+    btnDU.onclick = function () {
+        directionInput.value = "DU";
+        draw();
+    };
+    var btnLR = document.getElementById("btn-LR");
+    btnLR.onclick = function () {
+        directionInput.value = "LR";
+        draw();
+    };
+    var btnRL = document.getElementById("btn-RL");
+    btnRL.onclick = function () {
+        directionInput.value = "RL";
+        draw();
+    };
+</script>
+<br>
+
+<div id="mynetwork"></div>
+
+<p id="selection"></p>
+</body>
+</html>