How many items I can put in form-dropdown?

I need to have (+o-) 9.000 items in a form-dropdown. I copied this items and it seems to work, but in the live form I am not be able to select all. I can see "only" 3.000 items.

My colleague Raul already posted an answer to this issue. Please go to the original thread: http://www.jotform.com/answers/578972-Can-I-enter-9000-items-in-a-dropdown-field

Please don't open multiple threads with the same issue. Thank you for understanding.