I see a few potential culprits here:
1) Are you setting the <a name=".."> tab within flash? If so, that's not going to work. Firstly, I'm not sure if Flash is able to read the <a name=".."> tag. It can read anchors but I'm not sure if all the properties are available to it. Even if it can though, your linking to the same point from where you're calling the link, so it won't make a difference. You're better off declaring that directly in your HTML.
2) Is the link showing up in Flash? If not, it's probably because you're not escaping the quotes. Change this:
Code:
<a href="#top">Back to top</a>
to
Code:
<a href=\"#top\">Back to top</a>
Tip: If you're going to be using Flash for navigation, make sure there is an alternative for people that don't have Flash installed.
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