can you tell when iframe content has changed?

[halfasleeps]

I have a page where I load in a template from another company via IFRAME, the template I cannot change, but on a certain page of the template within the iframe I would like to tell the user some extra information, but my page remains the same and only the information in the iframe reloads, so is there a way to tell when the iframe changes so i can innerHtml some extra info on certain parts?

Thanks.

[felgall]

If the iframe is loading from a different domain then you have no access to see what it contains at all.

[halfasleeps]

I dont need to know what it contains I just need to know if it is changing, theres no way to tell that it has been refreshed?

yes it is on a different domain.

[the DtTvB]

onload.