[ic] Can an [error] tag cover more than one input field?

[Interchange user]

I have credit card start date fields on checkout.html that are conditionally 
required, depending on card type (they default to blank). The input fields 
are in the same drop-down month & year format as the expiry date.

Is there a way to include more than one 'name=' parameter in an [error] tag, 
to cover both the start month and year, so that the same label can be 
highlighted if either of the two fields is left empty?

Thank you in advance.