Id should be unique, why would you want to have the same id for different elements?
Joined: Jan 05, 2011
No, it should not be unique...both id and name, because i cant generate unique id.
Joined: Apr 08, 2009
No, really, it should be unique, other thing is that you don't want to make it unique, but imagine you are going to travel by plane and another guy has the same ticket number that you have, what happends?
A workarround if you want to do it this way is use the getElementsByTagName('select') but I would try to have unique ids as I have told you before.