HOW TO: Change the location of a floating iFrame?

[gsb]

I am trying to relocate a floating iFrame on a page like I would a DIV:
getElementById( "DIVid" ).style.top = "200px";
getElementById( "DIVid" ).style.left = "200px";

....and size:
getElementById( "DIVid" ).style.width = "500px";
getElementById( "DIVid" ).style.height = "300px";

Fine is IE but Netscape does not like it when I use the iFrameID instead of
the DIVid

So, does anyone know how to change these style properties on the iFrame
itself?

Thanks,

gsb