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+<!doctype html>
+<html>
+<head>
+  <title>Network | DOT language playground</title>
+
+  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
+  <script src="../../../../dist/vis.js"></script>
+  <link href="../../../../dist/vis.css" rel="stylesheet" type="text/css" />
+
+  <style type="text/css">
+    body, html {
+      font: 10pt sans;
+      line-height: 1.5em;;
+      width: 100%;
+      height: 100%;
+      padding: 0;
+      margin: 0;
+      color: #4d4d4d;
+      box-sizing: border-box;
+      overflow: hidden;
+    }
+
+    #header {
+      margin: 0;
+      padding: 10px;
+      box-sizing: border-box;
+    }
+
+    #contents {
+      height: 100%;
+      margin: 0;
+      padding: 0;
+      box-sizing: border-box;
+      position: relative;
+    }
+
+    #left, #right {
+      position: absolute;
+      width: 50%;
+      height: 100%;
+      margin: 0;
+      padding: 10px;
+      box-sizing: border-box;
+      display: inline-block;
+    }
+
+    #left {
+      top: 0;
+      left: 0;
+    }
+
+    #right {
+      top: 0;
+      right: 0;
+    }
+
+    #error {
+      color: red;
+    }
+
+    #data {
+      width: 100%;
+      height: 100%;
+      border: 1px solid #d3d3d3;
+      box-sizing: border-box;
+      resize: none;
+    }
+
+    #draw {
+      padding: 5px 15px;
+    }
+
+    #mynetwork {
+      width: 100%;
+      height: 100%;
+      border: 1px solid #d3d3d3;
+      box-sizing: border-box;
+    }
+
+    a:hover {
+      color: red;
+    }
+
+  </style>
+  <script src="../../../googleAnalytics.js"></script>
+</head>
+<body>
+
+<div id="header">
+  <h1>DOT language playground</h1>
+
+  <p>
+    Play around with the DOT language in the textarea below, or select one of the following examples:
+  </p>
+  <p style="margin-left: 30px;">
+    <a href="#" class="example" data-url="data/simple.gv.txt">simple</a>,
+    <a href="#" class="example" data-url="data/computer_network.gv.txt">computer network</a>,
+    <a href="#" class="example" data-url="data/cellular_automata.gv.txt">cellular automata</a>,
+    <a href="#" class="example" data-url="graphvizGallery/fsm.gv.txt">fsm *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/hello.gv.txt">hello *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/process.gv.txt">process *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/siblings.gv.txt">siblings *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/softmaint.gv.txt">softmaint *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/traffic_lights.gv.txt">traffic lights *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/transparency.gv.txt">transparency *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/twopi2.gv.txt">twopi2 *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/unix.gv.txt">unix *</a>,
+    <a href="#" class="example" data-url="graphvizGallery/world.gv.txt">world *</a>
+  </p>
+  <p>
+    The examples marked with a star (*) come straight from the <a href="http://www.graphviz.org/Gallery.php">GraphViz gallery</a>.
+  </p>
+  <div>
+    <button id="draw" title="Draw the DOT graph (Ctrl+Enter)">Draw</button>
+    <span id="error"></span>
+  </div>
+</div>
+
+<div id="contents">
+  <div id="left">
+    <textarea id="data">
+digraph {
+  node [shape=circle fontsize=16]
+  edge [length=100, color=gray, fontcolor=black]
+
+  A -> A[label=0.5];
+  B -> B[label=1.2] -> C[label=0.7] -- A;
+  B -> D;
+  D -> {B; C}
+  D -> E[label=0.2];
+  F -> F;
+  A [
+    fontcolor=white,
+    color=red,
+  ]
+}
+    </textarea>
+  </div>
+  <div id="right">
+    <div id="mynetwork"></div>
+  </div>
+</div>
+
+<script type="text/javascript">
+  // create a network
+  var container = document.getElementById('mynetwork');
+  var options = {
+    physics: {
+      stabilization: false,
+      barnesHut: {
+        springLength: 200
+      }
+    }
+  };
+  var data = {};
+  var network = new vis.Network(container, data, options);
+
+  $('#draw').click(draw);
+
+  $('a.example').click(function (event) {
+    var url = $(event.target).data('url');
+    $.get(url)
+        .done(function(dotData) {
+          $('#data').val(dotData);
+          draw();
+        })
+        .fail(function () {
+          $('#error').html('Error: Cannot fetch the example data because of security restrictions in JavaScript. Run the example from a server instead of as a local file to resolve this problem. Alternatively, you can copy/paste the data of DOT graphs manually in the textarea below.');
+          resize();
+        });
+  });
+
+  $(window).resize(resize);
+  $(window).load(draw);
+
+  $('#data').keydown(function (event) {
+    if (event.ctrlKey && event.keyCode === 13) { // Ctrl+Enter
+      draw();
+      event.stopPropagation();
+      event.preventDefault();
+    }
+  });
+
+  function resize() {
+    $('#contents').height($('body').height() - $('#header').height() - 30);
+  }
+
+  function draw () {
+    try {
+      resize();
+      $('#error').html('');
+
+      // Provide a string with data in DOT language
+      data = vis.network.convertDot($('#data').val());
+
+      network.setData(data);
+    }
+    catch (err) {
+      // set the cursor at the position where the error occurred
+      var match = /\(char (.*)\)/.exec(err);
+      if (match) {
+        var pos = Number(match[1]);
+        var textarea = $('#data')[0];
+        if(textarea.setSelectionRange) {
+          textarea.focus();
+          textarea.setSelectionRange(pos, pos);
+        }
+      }
+
+      // show an error message
+      $('#error').html(err.toString());
+    }
+  }
+</script>
+</body>
+</html>
