gistfile1.js

var sys = require("sys"), 
    dom = require("jsdom/lib/level1/core").dom.level1.core,
    fs = require("fs"),
    sax = require("jsdom/example/sizzle/sax"),
    document =  require("jsdom/lib/browser").windowAugmentation(dom, {parser: sax.parser()}).document,
    div = document.createElement('div');

document.body.appendChild(div);

div.innerHTML = "<span><img src='test' />foo<br /> bar<br /> </span><p><script>alert('test');\n\nconsole.log();</script>ting</p>";

sys.puts(document.outerHTML);