Netscape equiv of IFRAME?

I’m running Ikonboard, and the time has come to stick ad banners on the mofo. Problem is, every decent banner rotation script relies on SSI, which you can’t run from within another cgi script. So I’m thinking about using <IFRAME>.

Unfortunately, about 30% of my users are on Netscape (including me), which doesn’t support IFRAME. Is there an equivalent tag for NS4+ that will let me embed an shtml page in my board template?

Tanx.

Check out ad-rotator.com, which is what I use on a couple of my sites. Not necessarily to use, but just to see what it uses. IIRC, it uses both iframes for MSIE folk and DHTML layers for NS users. Layers seems kinda overkillish to me but, hey, it works.