I tried with self and top, and it's working , but maibe you don't want to leave the page ...
Yes, I can get it to work with _self and _top, however I need the primary tour window to stay accessible (meaning a new tab or window needs to open -_blank). The thing is that it works with the <layers> onclick attribute but not with a hotspot attribute (see thread from Tuur & Klaus: internetexplorer ). Also some interesting reading / concepts here, but the drawbacks to this approach seam sketchy - http://stackoverflow.com/questions/9514…tdefault-is-set.