Let's say you have a very standard pagination setup. < Previous Page 1 2 3 ... 9 Next Page > On page 1 would you display the Previous Page button? And along the same lines, would you ...
I have a web application that upon user login will assign a role/permission based on various criteria from a corporate Active Directory. e.g. membership in a group, attributes in their user entry, ...
What is a good criterion or rule-of-thumb for determining when a control should be greyed-out and when should it be completely invisible?