Force-Directed Layout with Append on Double-Click

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<!DOCTYPE html>
<html>
<head>
<title>Force Plus Append</title>
<script type="text/javascript" src="https://d3js.org/d3.v2.min.js"></script>
<script type="text/javascript" src="append_force.js"></script>
</head>
​
<body onload="viz01();">
<div id="viz01_main"></div>
</body>
</html>
​
​
    

Modified http://d3js.org/d3.v2.min.js to a secure url

https://d3js.org/d3.v2.min.js