combobox set value of select list

How friends. I just downloade dand am testing the combobox component. How trying to figure out how to set the value of a select list with javascript. I’m trying to set like so “ = ‘FORD’;”. and nothing happens to my combox component. What am I doing wrong?

After you have native select converted to the combo, you need to use API of combo to set|get values

var combo = dhtmlXComboFromSelect(select);