gistfile1.js

buildNode = function(tag, attrs){
    var node = document.createElement(tag);
    for(var k in attrs) {
        node.setAttribute(k, attrs[k])
    }
    return node;
};

text = function(text) {
    return document.createTextNode(text);
};

xml = function(tag, attrs, closure){
    var node = buildNode(tag, attrs);

    if(closure) {
        var scope = {
                  xml: function(tag, attrs, closure) { node.appendChild(xml(tag, attrs, closure));},
                  text: function(t) { node.appendChild(text(t)); }
                 };

        closure.apply(scope);
    }

    return node;
};