code: function(event, url, frameName, disposition, options){
  				event.preventDefault();
  				if (false === undefined) {// Always open new tabs for now
  					createWindow(url);
  				} 
  				else if (Url.parse(url).hostname !== "localhost") {
  					electron.shell.openExternal(url);
  				}
  				else {
  					nextWindow.webContents.executeJavaScript('createTab("' + url + '");');
  				}
  			}
docs: /* @callback