codetype attribute | codeType property
Sets or retrieves the Internet media type for the code associated with the object.
the media type.
Internet media types are also known as MIME types.
The codeType property is read-only for any pre-existing object in an HTML document. For instances of objects that are created in script, the codeType property is read/write-once, because the codeType property is written when an object is created. After an instance of an object is created, the codeType property is read-only.