Printing old exams not cancellable

[nick75g]

After clicking "Print" on an exam, the site asks for a valid Student ID. If "Cancel" is pressed, the site responds as if an invalid Student ID has been given; the popup comes back up with the caption "I said Student ID!". This means that, if you (accidentally) press "Print", there is no way to cancel the operation and you have to enter some Student ID.