index.html

<html>
<head>
    <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
    <link rel="stylesheet" type="text/css" href="css/bubbles.css">
    <link rel="stylesheet" type="text/css" href="css/tipsy.css">
</head>
<body>
<div id="toggles" class="btn-group">
    <button type="button" class="btn btn-default" data-view="global">Global</button>
    <button type="button" class="btn btn-default" data-view="region">Show by region</button>
    <button type="button" class="btn btn-default" data-view="incomegroup">Show by income group</button>
</div>
<div>
    <svg id="chart"></svg>
</div>
    <script src="js/jquery-1.11.1.min.js"></script>
    <script src="js/jquery.tipsy.js"></script>
    <script src="js/d3.min.js"></script>
    <script src="js/queue.v1.min.js"></script>
    <script src="js/bubbles.js"></script>

</body>
</html>