Can 2 separate SWFs embedded in a web page interact?

Am I crazy or is there a way for one SWF to control another, completely separate SWF embedded in the same HTML page? I ask because I want to create a nav system inside a scalable HTML table, where a MainNav.swf and a SubNav.swf sit in separate cells. Wonder if there’s some kind of fancy targeting where the MainNav.swf can trigger rollovers, links and other actions in the SubNav.swf.
Thanks for your wisdom.