docs: function(doc, src) {
  		var iframe = doc.createElement("iframe");
  		var spirit = this.possess(iframe);
  		spirit.css.add("gui-iframe");
  		/*
  		 * TODO: should be moved to src() method (but fails)!!!!!
  		 */
  		if (src) {
  			if (gui.URL.external(src, doc)) {
  				var url = new gui.URL(doc, src);
  				spirit.xguest = url.protocol + "//" + url.host;
  				//src = this.sign ( src, doc, spirit.$instanceid );
  			}
  		} else {
  			src = this.SRC_DEFAULT;
  		}
  		iframe.src = src;
  		return spirit;
  	}