I'm using this to load external images as background on different frames.

loadMovie("flash/images/back1.swf", "_root.loader");

Frame 1-8 have back1.swf as background.
Frame 9-12 have back2.swf as background.

I don't want to load the swf. all the time I'm in a different frame, I want to be able to check that if I'm in Frame 2 and back1.swf is loaded not to load it again.
However if I jump to frame 10 It needs to load back2.swf.

Thanks.