Javascript - How can I find the submit button in the DOM?

Sorry for the somewhat obscure question. 

For certain question slides in my eLearning, I would like to be able to automatically find out the submit button's CSS selector, so that I can use cp.hide() and cp.show() with it.  I've been doing this manually by looking at the DOM after publishing, but because the every submit button has a different css selector, this is annoying.

Is there a way to crawl the DOM on slide enter and find the submit button?

TLCMediaDesign??

Thanks for any help!

- Ryan