I need to pass a parameter, because I would like to redirect back to the module and query string of the current page.

So I can get from

1. showdown/index?id=35 --click---> showdown/vote?id=1
2. showdown/vote?id=1 --redirect--> showdown/index?id=35

The vote action is not seen.

(The redirect method doesn't work as it takes the index.php url only and no actions, and I cannot find a helper in Magento for creating hyperlinks.)

Does Magneto have a link helper for this?

Example of stuff I want: <a href="<?php echo Mage::Helper->Link->($url, $array); ?> then $array or whatever variables gets sent to the controller.