How to set the value of a combobox

[gcjm]

Combobox in a canvas section:

The different values are provided by a SELECT ... DISTINCT statement.
I can get a single set value "cValue" like this:

var oItem = Lianja.getElementByID("page1.section1.field1");
var cValue = oItem.value;

My question:
How can I set the combobox to one of its values by a statement?
For example

oItem.value = "FRA";

doesn't work.

Thanks for hints!
Georg

[barrymavin]

item.text = "FRA" will select it.