loadMovieNum: Check if SWF exists

Hello:

I’m using loadMovieNum to load pages of content into the root movie.

I have the name of the SWF file set as a string variable, then:
loadMovieNum(var + “.swf”, _levelN);

I want to be able to monitor the function so that if the SWF doesn’t exist, I can open an “page not found” error movie (like 404 Error). I want to keep loading my content into specific levels; the only thing I want to monitor is whether the SWF exists or not.

(I know when compiling you get an “error loading file” in the Output Panel when loadMovieNum tries to load a SWF that doesn’t exist. I want to be able to monitor this at run-time with ActionScript.)

As I submit this, I hear some of you saying "Why don’t you use MovieClipLoader.onLoadError() ?