The mimeType object belongs to the navigator object. The object represents a MIME type specification. Its properties let scripts find out if the browser is equipped to handle a specific MIME type of external content before it is loaded from the server. All these properties are mirrored in the internal document displayed when you choose Navigator's About Plug-ins menu option. Internet Explorer 5 for the Macintosh implements this scheme, but Explorer for Windows uses an entirely different system for determining support for external media via the object element.