Problem with form

Hi If a have a <select name="omr[]">, what is the name of the "select"? I tried with both "omr" and "omr[]", but no one works. It works fine if the name is "omr" but then it is only one value posted. Maybe its easier to understand if you see it yourself: http://www.lokalguiden.se/index2.php?action=ledigalokaler It's the second select I must name omr[] to get all the values posted but then the javascript doesn't understand the name omr[], what to do? Thx.