So when they click on the link, it should submit a form somewhere...?
It's not clear what you exactly want. Might also want to remove "return false;" in the onclick.
OK the code above is the code for the Forum Block that has a button for them to click on and it puts them in a usergroup. When they click on it, I want it to redirect them to the roster.php?roster=***** page which is just a list of those people. Right now it places them in the usergroup but does not re-direct them to the roster page. Below is the custom html for the block template. I just want it to be click>>assign to usergroup id >>>> redirect to roster page for that usergroup.