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<html>
<head>
<title>Easy example | CartoDB.js</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<link rel="shortcut icon" href="https://cartodb.com/assets/favicon.ico" />
<style>
html, body, #map {
height: 100%;
padding: 0;
margin: 0;
}
</style>
<link rel="stylesheet" href="https://libs.cartocdn.com/cartodb.js/v3/themes/css/cartodb.css" />
</head>
<body>
<div id="map"></div>
<!-- include cartodb.js library -->
<script src="https://libs.cartocdn.com/cartodb.js/v3/cartodb.uncompressed.js"></script>
<script src="viz.js"></script>
<script>
function main() {
cartodb.createVis('map',vizjson)
}
window.onload = main;
</script>
</body>
</html>
Modified http://libs.cartocdn.com/cartodb.js/v3/cartodb.uncompressed.js to a secure url
https://libs.cartocdn.com/cartodb.js/v3/cartodb.uncompressed.js