Thanks for the reply.
I read the other thread, but do not know what the change really means. "We have changed the code on the thank you page so that the download links can't be prefetched by AVG's linkscanner and similar programs". I know that the download links submit a form on the page at the moment, but they seem to work fine for me. Would they not work if I was using AVG etc? While I'm scraping the thank you page code, I don't do anything with it, I just spit it out as is. So, I was hoping that most code changes you could make to it would not affect things, avoiding the weakness with screen scraping. The only things I could see that would mess things up were if the thank you page contained relative (local) links or if you turned the thank you page into a complete html page.
With the iframe, I was having trouble getting the colouring of the page to show up consistently in all browsers. I was adding a <style type="text/css"> block to the box where i can put html etc, but since that does not end up in the head of the iframe, i thought that might have been causing issues. Also, there does not seem to be a consistent parent element that I can style, so without knowing all permutations of the thank you page, I was finding it tricky. The iframe content seems to be just a fragment of a HTML page instead of a complete HTML doc in its own right, so I think that's causing a problem.
I would need to style the iframe so that it was all light text on a black background. When this wasn't working properly, the text would often look invisible (black on black) which would be a disaster if it happened to a customer.
Have you any samples for sites needing a dark background thank you page?
Thanks for your time,