I would like to have 5 combo boxes from which users can choose fields to search, e.g.
cbo1 - choose YEAR, TYPE, LOCATION, COST, COLOUR, SIZE
cbo2 - choose YEAR, TYPE, LOCATION, COST, COLOUR, SIZE
cbo3 - choose YEAR, TYPE, LOCATION, COST, COLOUR, SIZE
cbo4 - choose YEAR, TYPE, LOCATION, COST...