Passing variables to page via POST - How?

This is probably more of an HTML question... Is there a way to pass variables to another page via POST instead of via the URL? I need to pass several variables, one that is an array and another that is a fairly long string, so, I can't really do this via the URL. My initial idea was to just create a very simple form that only has hidden fields with the data I want to pass, along with an image Submit button that would call the page and pass the hidden field variables. Is that the only/best way to accomplish this? Thanks. Monty