Dynamically parse a string to a DOM to be used with jQuery. It's very useful because it allows to parse non-XML content (either XML not declared as such or HTML)

gistfile1.js

  _updateBody: function(str) {
    /****************************************************************************************************
     * This function creates a new document object to be used to parse a HTML string.
     * 
     */
    var domDocument = document.implementation.createHTMLDocument();
    
    var range = domDocument.createRange();
    range.selectNode(domDocument.body);
    var documentFragment = range.createContextualFragment(str);
    domDocument.body.innerHTML = "";
    domDocument.body.appendChild(documentFragment);
    
    return domDocument;
  }

Good stuff, Davide!
Gives me some motivation to dig through documentation :)