external | NN n/a IE 4(Win) DOM n/a
The external object is used primarily by developers who use Internet Explorer as a component for their applications and require access to custom extensions to the document object model. But you might add one or two of this object's methods into your work for an IE/Windows audience.
The following syntax example asks a user for permission to insert a script-controlled bookmark into the browser's Favorites list:
    external.AddFavorite("URL", "Favorites List Label");
The following syntax example loads another URL into the a target window or frame (or the current window if the third parameter is an empty string), and then performs a text find for the third parameter string:
    external.NavigateAndFind("URL", "searchString", "targetFrameName");
For more details, visit http://msdn.microsoft.com/workshop/browser/overview/overview.asp.