Service Portal Widget "Server Script" function($sp) or function()?

[xiaix]

Should I be putting $sp as a function parameter or not?  It seems to work either way.

(function() {
	var cat_item_SYSID = $sp.getParameter('sys_id');
})();

OR

(function($sp) {
	var cat_item_SYSID = $sp.getParameter('sys_id');
})();

[xiaix]

Thanks for that link.  It was quite informative.