Validating ASP Pages

[Motabobo]

I was wondering if there was a place to validate the HTML output sent by an ASP page ???

I tried the WC3 MarkUp Validation Service but i always get this error : Sorry, I am unable to validate this document because its content type is text/plain, which is not currently supported by this service.
So i'm gessing that it is not supported or maybe that's because i use includes (inc files) ???

Any help appreciated :)

Thanks !

[Motabobo]

I'll give it a try when i get home but i was thinking, maybe it's because i submitted a local file without submitting the url (i mean how the validator will process asp if it doesn't come from a webserver ?)

Thanks !