JavaScript Help for HotKey Creation For Craigslist 'Continue' Button

On each step in the process of creating an ad on Craigslist, the user must click a button labeled 'Continue'. I was hoping to assign a HotKey combination to trigger the submit button for the page instead of having to click a button with the mouse.

Unfortunately, not all the 'Continue' buttons have the same HTML define them. I do believe they are all 'Submit' type buttons.

Here is the HTML for the button:

Let me know if I can add more detail for my request.