How can i simplify this code?

hey guys,

i donno anything about arrays yet, i havent touched upon them so far and am ABSOLUTELY planning to.

okey, so heres my question and the pain in my butt;

big_pic0.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progressListener);
big_pic.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progressListener);
big_pic2.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progressListener);

big_pic39

how can i simplify this instead of writing all the commands down line by line?