I'm trying to create a column-based list within a <select> element with multiple=multiple - what I'd like to see in the menu is:
Opt1 Opt5 Opt9
Opt2 Opt6 Opt10
Opt3 Opt7 Opt11
Opt4 Opt8 Opt12
Is this possible? I'm certainly open to doing this in jQuery but would prefer CSS.
It is most definitely possible.
There are several options suggested in this similar SO question.
And this very popular question takes it a bit further, adding autocomplete.
And if you google "jquery multi-column dropdownlist" you can find several more choices.
BTW, the "multiple
" attribute specifies whether the user can select multiple items in the list, not whether there are multiple columns displayed in the dropdownlist.