My Solution to http://jsfiddle.net/jondavidjohn/9WpZ6/

solution.js

    //
    // Start Method Definitions
    //
    //    match_selector(Node tree, Array selectors)
    //        - top of the node tree
    //        - array of decendant string selectors (think CSS)
    //
    var match_selector = function self(node, selectors) {

        if ( node.values.indexOf(selectors[0]) !== -1 ) {
            if (selectors.length > 1) {
                selectors.shift();
            }
            else {
                output(node);
            }
        }

        for (var i = 0, len = node.children.length; i < len; i++) {
            self(node.children[i], selectors.slice());
        }
    };