javascript: visible but doesn't print?

I've figured out how to make button visible based on a certain field being digitally signed, however I'd prefer it to be made visible but not printable, now I know you can set that manually, but can you set it through javascript? I've searched and searched but can't find any reference to it.

example.display = display.visible; //is the current code I'm using and it works a treat, I'd just rather it wasn't printable if possible.

regards
Craig