you need to edit the redirect of the add to cart button code to include the anchor:
change:
$ATC_RedirectAfter = "";
to:
$ATC_RedirectAfter = "#".$_POST["PrintCart_1_ID_Add"]."";
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.