Updated missing url https://raw.github.com/mbostock/d3/v2.4.3/d3.js to https://cdn.jsdelivr.net/gh/mbostock/d3/v2.4.3/d3.js
Modified http://x3dom.org/x3dom/example/x3dom.js to a secure url
https://raw.github.com/mbostock/d3/v2.4.3/d3.js
https://x3dom.org/x3dom/example/x3dom.js