good_url not positioned at top of page

[webjoy]

I am using form mail in an iframe context.
Problem is when the subsequent good_url page is opened it opens at the position of the form mail submit button i.e. scrolled down beyond my confirmation message text, this means that the user has to page up to see it!

What is the best way to get it to open at good_url so that it displays from the top of the page?

I've tried adding a bookmark (or anchor) e.g. #top to the form entry for good_url and within the relevant page but this is ignored, or doesn't deliver the effect.

https://www.newleaf.uk.com/contact.htm

Another curiosity is, why does the scroll down behaviour happen with good_url but doesn't happen with bad_url? (strikes me that this is a misnoma in this example, good doesn't work, bad does work...).

By the way don't be mislead with the use of java script scrollTo - I put that in after the initial problem to see if it would help - it doesn't.