Definition: The mimeTypes class defines a collection containing all of the mime types supported by the browser. This is not a reserved word so you can declare your own variable or function called mimeTypes but if you do then you will not be able to reference the list of mimetypes.
Examples:
for (var i=0;i<navigator.mimeTypes.length;i++) document.write(navigator.mimeTypes[i].type+'<br />');