[Freesteyelz]

That's not quite what I meant but I see where you're coming from. In W3C standards you can list similiar ID's such as (e.g., hide1, hide2, hide3, etc...) in the same document. The reason for this is to separate each one from one another. The class element brings common attributes/values into the unique ID's. That's where redundancy of the "class" is usefull.

In the modification I chose (ID's): hidemsg, hidesig, hideadvnews, hideadvsig. All in which are unique. I can now add "class" into the element if I chose to. To test, give each of the 4 modification different values. They will all behave independently from one another.