On my web page (asp.net 2) a paramater is passed via a querystring from a previous link to output a list of staff emails from a stored procedure on SQL Server. This is displayed in the gridview control.

My question is, does this offer sufficient protection from spammers, if any at all as opposed to 'encrypting' emails in java script?

Well, not my area of expertise, but from what I understand, anything you post on your page can be read by crawlers that go through pages and extract anything that resembles an email address. Having this come from a SP and using a gridview control offers no protection. That is why you see a lot of people now using images for this kind of info.