Check if specific swf is loaded in spec level?

I am making a site with several external swf’s that are loaded into different levels. Every menu button loads two swf’s - one specific for that page, and one general for that category. Like the ABOUT button always loads generalabout.swf into level 2 and aboutus.swf or aboutyou.swf or aboutthree.swf into level 3. Is there a way to add to the menu button About Us, About you etc, a check if generalabout.swf is already loaded into level 1, and then only load the aboutus.swf or aboutyou.swf? And if it in’t loaded (becuase say generalcontact.swf is already loaded into level 1) then load it? Am I making any sense?

Much appreciated if anyone can help!