Trying to make a hotkey for online math homework submit button. Any advice?

My skills are very basic (about halfway through udacity CS101). My school uses WebWork which is an online math homework system. I would like to make a shortcut for the submit answer button. I was hoping there would be a link when I right-clicked the button but there isn't. When I right click and inspect element in Chrome, this is what I see:

<input type="submit" name="submitAnswers" value="Submit Answers" onclick="">

I have no idea what I'm doing. Do I need to use Firebug and javascript to make this? I assume it's possible. Cheers.