gistfile1.txt

  findDocument: function(target) {
    if (target.documentElement) return target;
    if (target.document) return target.document;
    if (target.lsd) return;
    var body = target.ownerDocument.body;
    var document = (target != body) && Element.retrieve(body, 'widget');
    while (!document && (target = target.parentNode)) {
      var widget = Element.retrieve(target, 'widget')
      if (widget) document = (widget instanceof LSD.Document) ? widget : widget.document;
    }
    return document;
  },