code: function(url, win, attributes) {
  
          var o = {
              id:   "yui__dyn_" + (nidx++),
              type: "text/css",
              rel:  "stylesheet",
              href: url
          };
  
          if (attributes) {
              lang.augmentObject(o, attributes);
          }
  
          return _node("link", o, win);
      }
docs: Generates a link node
  @method _linkNode
  @param url {string} the url for the css file
  @param win {Window} optional window to create the node in
  @return {HTMLElement} the generated node
  @private